Notes: Ear to fan-shaped, uniformly thick (ca. 1 cm), smooth, crumbly, reddish brown (pale in shaded parts). Can be confused with Cribrochalina vasculum (Lamarck, 1814), also pictured here, which is tougher and elastic. Also, with Petrosia weinbergi van Soest, 1980, pictured here, with which it shares a wide range size of oxea spicules, but lack the small toxa, is more crispy in consistency, and is greenish.
Author Reference: (de Laubenfels, 1934)
Link: World Porifera Database