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Variable boring sponge
Aka coralliphaga
(Ruetzler, 1971)

Description:
A boring sponge which grows in a wide variety of patterns: they appear as an encrusting sponge; as vase-like tubes extending from coral heads; as finger-like branches extending from the coral; or as tiny tubes extending from dead coral areas.

Color:
Sulfur- to lemon-yellow, occasionally white.

Habitat:
Inhabit coral reefs and drop-off walls. Bore into corals by secreting minute amounts of acid. This sponge bores large, fist-sized holes in coral heads.

Distribution:
Occasional to rare Florida; common Bahamas and Caribbean.

Variable boring sponge (Aka coralliphaga)