---
title: Animals in the sea and the river — how Mova does on the tests · Myths
description: Lesson 11 of the myths course of Mova's primary school: 3 of 10 tests right, exam 1 of 4, every question with the options, the student's choice, the right answer and why it chose.
---

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# Animals in the sea and the river

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**Tests:** 3 of 10 right · **Exam:** 1 of 4 right · **Kind:** ★ · **Understood:** 9 of 14 · **Run:** 2026-10-18, commit `f3c23ea72`

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Lesson 11 of the myths course of Mova's primary school, as Mova's small model took its tests: it had read this lesson and the ones before it and learned from their exercises. Each test shows the options in the order the student saw them, its choice, the right answer, the score of every option and why it chose. The lesson itself, sentence by sentence with trees and pragmatics: [the lesson in the corpora](https://md.mova.elamur.ai/free/en/corpora/school/myths/11-animals-in-the-sea-and-the-river/).

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Every question of this lesson and each of its options parsed by Mova, with trees and pragmatics: [the lesson's questions in the corpora](https://md.mova.elamur.ai/free/en/corpora/questions/myths/11-animals-in-the-sea-and-the-river/).

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### Test 1 · ★ · wrong ✗ {#t1}

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"Whales live in the sea, so they're fish, obviously." What's the flaw?

- **1.** Fish breathe air too, so there's no difference at all — **← Mova's choice** · score 0
- **2.** Whales live on land too — no support
- **3.** Where an animal lives doesn't decide what it is — **✓ the right answer** · no support
- **4.** Nothing, sea animals are all fish — no support

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**Why:** It took the question to ask which statement is true. It chose option 1 with score 0, the only option with support. Its support: lesson 11, line 7: «Whales are mammals: they breathe air, give birth to live babies and feed them milk.», reached through the option's own match among the sentences about the question's things. What matched: the same action «breathe» (+1). Against it: a different doer (counts against) (-1). The right option, 3, found no support in what it remembers. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/myths/11-animals-in-the-sea-and-the-river/t1/)

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### Test 2 · ★ · right ✓ {#t2}

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In a sitcom, a friend wees on someone's jellyfish sting and it's cured. What would a lifeguard say?

- **1.** That's the best first aid there is — no support
- **2.** Wee works on jellyfish stings and on shark bites as well, so go for it — no support
- **3.** Only fresh wee works — no support
- **4.** Wee can make it worse; rinse with seawater and remove tentacles — **← Mova's choice** · **✓ the right answer** · score 12

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**Why:** It took the question to ask what it is done to. It chose option 4 with score 12, the only option with support. Its support: lesson 11, line 9: «Weeing on a jellyfish sting does not help and can make it worse; rinse with seawater, remove tentacles carefully and get help from a lifeguard.», reached through the same lesson line as the sentence the question matched. What matched: the same action «remove» (+4); it fills the role the question asks for (+4); the same thing acted on «tentacles» (+3); a different doer (counts against) (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/myths/11-animals-in-the-sea-and-the-river/t2/)

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### Test 3 · ★ · right ✓ {#t3}

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You see a shark lying still on the seabed in an aquarium. Is it dead?

- **1.** Yes, every still shark is dead — no support
- **2.** Probably not; some sharks like nurse sharks rest and pump water over their gills — **← Mova's choice** · **✓ the right answer** · score 12
- **3.** Yes, sharks can't breathe unless swimming — score 0
- **4.** It's asleep with both eyes shut, like us — no support

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**Why:** It took the question to ask which statement is true. It chose option 2 with score 12, against 0 for the next best. Its support: lesson 11, line 8: «Some sharks, like great whites, must keep swimming to breathe; others, like nurse sharks, can rest on the seabed and pump water over their gills.», reached through the same lesson line as the sentence the question matched. What matched: the same action «pump» (+5); the same thing acted on «water» (+4); the same place «gills» (+3). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/myths/11-animals-in-the-sea-and-the-river/t3/)

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### Test 4 · ★ · wrong ✗ {#t4}

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"Goldie's fine in that jam jar, she forgets it in 3 secs lol." How do you reply kindly?

- **1.** "True, so it doesn't matter." — **← Mova's choice** · no support
- **2.** "They can learn tricks and remember for months! Maybe she'd like a bigger tank." — **✓ the right answer** · no support
- **3.** "You're cruel and I'm telling everyone." — no support
- **4.** "Jars are better than tanks." — no support

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**Why:** Nothing it remembers matched the question, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/myths/11-animals-in-the-sea-and-the-river/t4/)

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### Test 5 · ★ · wrong ✗ {#t5}

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What would happen if a dolphin fell fully asleep with its whole brain, like we do?

- **1.** Nothing at all would change — no support
- **2.** It would sink and breathe water — **← Mova's choice** · score 8
- **3.** It might forget to come up to breathe — **✓ the right answer** · score 8
- **4.** It would sleep better and live longer — score 4

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**Why:** It took the question to ask what happens next. It chose option 2 with score 8, tied with another option at 8 (the first shown, or the one claiming less beyond what it knows, wins). Its support: lesson 11, line 15: «Dolphins rest one half of their brain at a time, so they can keep breathing and watching.», reached through what followed the sentence the question matched. What matched: the same action «breathe» (+4); the same doer «dolphins» (+4). The right option, 3, scored 8. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/myths/11-animals-in-the-sea-and-the-river/t5/)

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### Test 6 · ★ · wrong ✗ {#t6}

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Your uncle says fishing doesn't hurt fish because "they don't scream". What's the fair answer?

- **1.** He's right, no scream means no pain — no support
- **2.** Fish scream underwater all the time, where people can't hear them — no support
- **3.** Only big fish feel pain — **← Mova's choice** · score 9
- **4.** Not showing pain like us isn't the same as not feeling it — **✓ the right answer** · score 3

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**Why:** It took the question to ask what it is done to. It chose option 3 with score 9, against 3 for the next best. Its support: lesson 11, line 12: «Fish have pain receptors (nerve ends that sense harm) and react to injury, and many experts think fish can feel pain.», reached through the option's own match among the sentences about the question's things. What matched: it fills the role the question asks for (+3); the same action «feel» (+2); the same doer «fish» (+2); the same thing acted on «pain» (+2). The right option, 4, scored 3. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/myths/11-animals-in-the-sea-and-the-river/t6/)

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### Test 7 · ★ · wrong ✗ {#t7}

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A film shows a cow lowered into a river and eaten by piranhas in ten seconds. What's really true?

- **1.** That kind of scene is a legend from a staged show; real piranhas rarely attack — **✓ the right answer** · no support
- **2.** It happens every day in rivers — no support
- **3.** Piranhas live in British rivers too — no support
- **4.** Piranhas only eat cows, never fish — **← Mova's choice** · score 2

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**Why:** It took the question to ask which statement is true. It chose option 4 with score 2, the only option with support. Its support: lesson 11, line 11: «Piranhas mostly eat fish, insects and plants; attacks on people are rare and usually just nips, and the "cow in seconds" legend grew from a staged show with st…», reached through the option's own match among the sentences about the question's things. What matched: the same doer «piranhas» (+2); the same action «eat» (+1). Against it: a different thing acted on (counts against) (-1). The right option, 1, found no support in what it remembers. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/myths/11-animals-in-the-sea-and-the-river/t7/)

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### Test 8 · ★ · wrong ✗ {#t8}

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Megan says, "Bet you don't believe seahorse dads give birth!" What's the wise reaction?

- **1.** Say only mammal dads can do that — **← Mova's choice** · no support
- **2.** Laugh it off without ever checking — no support
- **3.** Check it, and admit it's true — **✓ the right answer** · no support
- **4.** Say all fish dads do that, so it's nothing special — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/myths/11-animals-in-the-sea-and-the-river/t8/)

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### Test 9 · ★ · wrong ✗ {#t9}

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An aquarium label says "Electric eel" but the guide says it isn't an eel. What's the lesson?

- **1.** The guide must be lying — **← Mova's choice** · no support
- **2.** Eels change species when electric — no support
- **3.** Labels are always more correct than tour guides — no support
- **4.** Names can be wrong; the animal is a knifefish — **✓ the right answer** · no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/myths/11-animals-in-the-sea-and-the-river/t9/)

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### Test 10 · ★ · right ✓ {#t10}

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A crab on the beach walks straight forwards. Your mate says "impossible, crabs ONLY go sideways". What do you say?

- **1.** Crabs walk forwards only at night when nobody's looking — score 4
- **2.** That crab must be broken — no support
- **3.** He's right, you must be dreaming — no support
- **4.** Most go sideways, but some kinds walk forwards — **← Mova's choice** · **✓ the right answer** · score 6

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**Why:** It took the question to ask what it is done to. It chose option 4 with score 6, against 4 for the next best. Its support: lesson 11, line 14: «Most crabs walk sideways because of how their legs bend, but some kinds can walk forwards.», reached through the remembered sentence the question matched. What matched: the same action «walk» (+3); the same property (+2); the same doer «kinds» (+1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/myths/11-animals-in-the-sea-and-the-river/t10/)

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### Exam question 1 · formal language · right ✓ {#e1}

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Which of the following statements most accurately characterises the classification of whales?

- **1.** They are mammals, breathing air and nourishing their young with milk — **← Mova's choice** · **✓ the right answer** · score 3
- **2.** They are reptiles possessing fins — no support
- **3.** They are amphibians, living both in and out of the water, as frogs do — no support
- **4.** They are fish, by reason of their marine habitat — no support

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**Why:** It took the question to ask who or what does it. It chose option 1 with score 3, the only option with support. Its support: lesson 11, line 7: «Whales are mammals: they breathe air, give birth to live babies and feed them milk.», reached through the same lesson line as the sentence the question matched. What matched: the same action «breathe» (+2); the same thing acted on «air» (+2). Against it: a different doer (counts against) (-1). · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/myths/11-animals-in-the-sea-and-the-river/e1/)

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### Exam question 2 · formal language · wrong ✗ {#e2}

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It is given that a bather has been stung by a jellyfish. Select the response consistent with established first-aid advice.

- **1.** Vigorous rubbing of the area with sand — **← Mova's choice** · no support
- **2.** Disregard of the sting until the following day — no support
- **3.** Rinsing with seawater, careful removal of tentacles and summoning a lifeguard — **✓ the right answer** · no support
- **4.** Application of urine to the affected area — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/myths/11-animals-in-the-sea-and-the-river/e2/)

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### Exam question 3 · formal language · wrong ✗ {#e3}

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Identify the parent which, among seahorses, carries the eggs and gives birth.

- **1.** The female — **← Mova's choice** · no support
- **2.** Neither, the eggs being abandoned upon rocks — no support
- **3.** The male — **✓ the right answer** · no support
- **4.** Both parents equally — no support

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**Why:** No option found support in what it remembers, so it guessed: it took the first option shown. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/myths/11-animals-in-the-sea-and-the-river/e3/)

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### Exam question 4 · formal language · wrong ✗ {#e4}

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Ascertain which of the following claims concerning the goldfish is consistent with experimental findings.

- **1.** It is incapable of learning to respond to sounds — **← Mova's choice** · score 5
- **2.** It retains memories solely of colours — no support
- **3.** Its memory is limited to a period of approximately three seconds — no support
- **4.** It is capable of retaining learned behaviour for months — **✓ the right answer** · score 2

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**Why:** It took the question to ask which statement is true. It chose option 1 with score 5, against 2 for the next best. Its support: lesson 11, line 6: «Goldfish can remember things for months and can be trained to respond to sounds and push levers for food.», reached through the option's own match among the sentences about the question's things. What matched: the same doer «goldfish» (+2); the same circumstance (+2); the same action «respond» (+1). The right option, 4, scored 2. · [the question and its options parsed, with trees and pragmatics](https://md.mova.elamur.ai/free/en/corpora/questions/myths/11-animals-in-the-sea-and-the-river/e4/)

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- ← previous: [10. Birds and baby animals](https://md.mova.elamur.ai/free/en/school-run/myths/10-birds-and-baby-animals/)
- next →: [12. Cats, dogs and animal 'facts' at home](https://md.mova.elamur.ai/free/en/school-run/myths/12-cats-dogs-and-animal-facts-at-home/)
- ↑ back to [Myths](https://md.mova.elamur.ai/free/en/school-run/myths/)