tube sponges come in many natural colors such as brown, dull green and yes, yellow. secondly tube sponges reproduce by spliting their selves in half. so i guess their only family is the one sponge.
No.
not necessarily .
zooplankton
the toe
porifera
a type of sponge that is purple
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They are shaped like a tube!
They eat bacteria, plankton and detritus.
Many coral reef organisms eat yellow tube sponges like angelfishes, filefishes, cowfishes and spadefish. Also the Hawksbill sea turtle.
i dont think i know ... :P