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There are six classes of animal:
There are six classes of animal:
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*'''[[Invertebrate]]s''' are the animals of [[dirt]] and don't have vertebrae. They include bugs, molluscs, and crustaceans.
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*'''[[Invertebrate]]s''' are the animals of [[dirt]]. Unlike the others, they don't have vertebrae. They include bugs, molluscs, and crustaceans.
*'''[[Fish]]''' are the animals of [[water]]. They swim and swim all day around [[lake]]s, [[river]]s, [[ocean]]s, and [[aquarium]]s.
*'''[[Fish]]''' are the animals of [[water]]. They swim and swim all day around [[lake]]s, [[river]]s, [[ocean]]s, and [[aquarium]]s.
*'''[[Amphibian]]s''' are the animals of [[slime]]. They undergo radical metamorphosis, starting as [[tadpole]]s. The most famous amphibians are [[frog]]s.
*'''[[Amphibian]]s''' are the animals of [[slime]]. They undergo radical metamorphosis, starting as [[tadpole]]s. The most famous amphibians are [[frog]]s.