A jellyfish is not a fish 'cause it doesn't have a backbone
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Same with starfish, shellfish, cuttlefish, and crayfish
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These are fake fish (fake fish... fake fish...)
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They said we're "fake fish"
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But we were first to evolve
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They said we're spineless, (it's true)
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But we have no bones at all
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Invertebrate means we don't have a backbone
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We're cold-blooded
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Some have shells, and some don't
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Arthropods, Echinoderms
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Cnidarians, Mollusks, Sponges, Worms
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Arthropods, Echinoderms
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Cnidarians, Molluscs, Sponges, Worms
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We are arthropods, more than 80% of animals
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We have exoskeletons: our strong outer shells
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Some fly, some swim, and most lay eggs
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You can tell us apart by our number of legs
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6 - Insects
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8 - Arachnids
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10 - Crustaceans, and then
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Myriapods have more than 10
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Echinoderms have spiny skin and like saltwater
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We're sea- urchins, -cucumbers, -stars, and sand dollars
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And also sea lilies. Now everybody listen
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We move, eat, and breathe through our water vascular system
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We're cnidarians, with coral and anemones
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We have a beautiful, radial symmetry
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We will sting you unless you're a friend
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We eat and poop out of the very same end (Eeugh!)
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We don't have organs, no body cavity
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Some stay in one place, and some swim free
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We Mollusks are soft, but some make shells in odd shapes
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Many of us have a radula, a tongue that scrapes
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We include bivalves, like clams, and cephalopods like me
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But most of us are snails and slugs
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Who live on the land, in freshwater, or the sea
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We are sponges, also called poriferans
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Because our skin has pores, that's the difference
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I started out swimming, but now I guess I'll
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Attach at the base, baby. That's called sessile
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So like, we're worms, but can you believe this song is lumping us all into one category?
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Yea, there are like 9 different phyla, and we have nothing in common
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Look... Many of us are Annelids: segmented worms and leeches (leeches)
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Or Nematodes, called roundworms. Some found in your breeches (breeches)
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Platyhelminthes, - f-flatworms to you (you)
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Only a few are p-p-parasites, too (too)
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From the microscopic myxozoan
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To the rare colossal squid
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Just remember who came before you
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Invertebrates did
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Arthropods, Echinoderms
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Cnidarians, Mollusks, Sponges, Worms
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Arthropods, Echinoderms
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Cnidarians, Molluscs, Sponges, Worms
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