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Phylum: Porifera
Calcerous Sponge (Calcium Carbonate)

Phylum: Porifera
Glass Sponge (Silicate)

Phylum: Porifera
Demosponge (Spongin)

A. Spongocoel
B. Osculum
C. Ostium

Phylum: Echinodermata
Subphylum: Asterozoa
Class: Asteroidea

Phylum: Echinodermata
Subphylum: Asterozoa
Class: Ophiuroidea
Phylum: Echinodermata
Subphylum: Asterozoa
Class: Ophiuroidea

Phylum: Echinodermata
Sub-Phylum: Echinozoa
Class: Echinoidea

Phylum: Echinodermata
Sub-Phylum: Crinozoa

Phylum: Echinodermata
Sub-Phylum: Blastozoa

A. Aboral
B. Oral

Madreporite

Anus

Ambulacral Groove

Mouth

A. Crown
B. Stalk

Pinule

Arms

Aboral Cup

Columnal

Holdfast