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Dark volcano sponge
Pseudaxinella zeai
Alvarez, Van Soest & Rützler, 1998

Spreading, massive, thick, with lobes up to 6 cm high and chimney-like oscules up to 1 cm in diameter (P. zeai-close up). Surface smooth, with small pores, approximately 1 mm in diameter, irregularly distributed. Infected with the Maroon sponge zoanthid (Parazoanthus puertoricense ). Crumbly, soft in consistency.

Surface purple brown, choanosome yellowish.

Found in coral reefs between 13 and 35 meter.

Rare Florida and Bahamas; occasional Caribbean.

Dark volcano sponge (Pseudaxinella zeai)