Category Nuances matching metazoan:

• primitive,
• small,
• higher,
• complex,
• simple,
• skeletal,
• colonial,
• motile,
• large,
• benthic,

Members for simple category metazoan:

• mammal,
• hydrozoan,
• nematode,
• bird,
• sponge,
• marine_mammal,
• coral,
• cnidarian,
• metazoan_larva,
• anthozoan_polyp,
• rotifer,
• holothurian,
• chordate,
• arthropod,
• planarian,
• worm,
• mollusc,
• vertebrate,
• fish,
• annelid,
• copepod,
• parasitic_worm,
• gastropod,
• poriferan,
• echinoderm,
• krill,
• drosophila,
• tardigrade,
• bryozoan,
• human,
• hydra,
• salp,
• bivalve,
• bryozoa,
• crinoid,
• crustacean,