# Worksheet: vertebrates and invertebrates (with answer key)

> Printable worksheet: sort Indonesian animals into vertebrates or invertebrates and their groups, answer short questions, then check the key.

Source: https://panduanhewan.org/en/learn/worksheet-vertebrates-and-invertebrates/ · Updated 2 October 2026 · English · Bahasa Indonesia: https://panduanhewan.org/id/belajar/lkpd-hewan-vertebrata-dan-invertebrata/
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## Activity 1

Write whether each animal is a vertebrate or an invertebrate, then name its group.

1. Komodo dragon
2. Crab-eating frog
3. Whale shark
4. Barn owl
5. Large flying fox
6. Sunda pangolin
7. Dragonfly
8. Coconut crab
9. Giant clam
10. Crown-of-thorns starfish
11. Earthworm
12. Jellyfish

## Activity 2

1. What is the main feature that separates vertebrates from invertebrates?
2. Name the five vertebrate groups with one Indonesian example of each.
3. Crabs have a hard shell. Why are they still invertebrates?
4. Why are amphibians said to live a double life?
5. Give one animal that is often put in the wrong group and explain its correct group.

## Answer key

1. Komodo dragon: Vertebrate – reptile
2. Crab-eating frog: Vertebrate – amphibian
3. Whale shark: Vertebrate – fish (cartilaginous)
4. Barn owl: Vertebrate – bird
5. Large flying fox: Vertebrate – mammal
6. Sunda pangolin: Vertebrate – mammal
7. Dragonfly: Invertebrate – arthropod (insect)
8. Coconut crab: Invertebrate – arthropod (crustacean)
9. Giant clam: Invertebrate – mollusc
10. Crown-of-thorns starfish: Invertebrate – echinoderm
11. Earthworm: Invertebrate – segmented worm (Annelida)
12. Jellyfish: Invertebrate – cnidarian

- 1. Whether the animal has a backbone. Vertebrates have one; invertebrates do not.
- 2. Fish (whale shark), amphibians (crab-eating frog), reptiles (Komodo dragon), birds (Bali myna), mammals (Sumatran orangutan). Other correct examples are accepted.
- 3. A crab's shell is an outer skeleton of chitin, not a backbone. Crabs have no backbone.
- 4. Because tadpoles live in water and breathe with gills, while adult frogs breathe air and can live on land.
- 5. Example: the Irrawaddy dolphin is a mammal, not a fish, because it breathes air and feeds its young on milk. Other correct answers: the pangolin (a scaly mammal) or the echidna (an egg-laying mammal).