color of marine invert black

Brittle Sea Star

more than 20 cm; near 25°c;
species: sea stars;
color of marine invert: light blue, black;
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Longspine Sea Urchin

more than 20 cm; near 25°c;
species: urchins;
color of marine invert: black;
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Mussel

5-10 cm; near 20°c;
species: clams;
color of marine invert: black;
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Blue Velvet Nudibranch

5-10 cm; near 25°c;
species: sea slugs;
color of marine invert: black;
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Sea Cucumber

more than 20 cm; near 25°c;
species: cucumbers;
color of marine invert: black, yellow, red, brown;
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Comanthus

more than 20 cm; near 25°c;
species: comanthina;
color of marine invert: black;
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