- Asteroidea
- Ophiuroidea
- Crinoidea
- Echinoidea
Category: DIVERSITY AMONG ANTMALS (THE KTNGDOM ANIMALIA)
- Filter feeding
- Piercing prey
- Scraping food
- Capturing prey
- A single pair of legs per segment
- Two pairs of legs per segment
- Three pairs of legs per segment
- No legs
- Jellyfish
- Sea anemone
- Coral
- Hydra
- Choanoderm
- Pinacoderm
- Mesohyl
- Gastroderm
- Maxilla
- Mandible
- Zygomatic
- Temporal
- Clavicles
- Scapulae
- Humeri
- Sterna
- Estrogen
- Testosterone
- Thyroid hormones
- Adrenaline
- Turtles
- Crocodiles
- Lizards
- Snakes
- Ray-finned fish
- Lobe-finned fish
- Cartilaginous fish
- Jawless fish
- Bilateral symmetry
- Presence of a coelom
- Presence of a notochord
- Multicellularity
- Gastropoda
- Bivalvia
- Cephalopoda
- Polyplacophora
- Cilia
- Flagella
- Tube feet
- Setae
- Nematoda
- Annelida
- Platyhelminthes
- Mollusca
- Choanocytes
- Cnidoblasts (Cnidocytes)
- Amoebocytes
- Colloblasts
- Nerve cord
- Pharyngeal slits
- Notochord
- Post-anal tail
- Asteroidea
- Ophiuroidea
- Echinoidea
- Holothuroidea
- Temperature regulation
- Camouflage and communication
- Respiration
- Feeding
