Spicules Image: a) Triactines; b) small triactines (few); c) triactine with a slightly larger actine (left, called parasagittal). Sample from the Bahamas.
Tissue Image: a) External view of the tightly anastomosed tubes (clathroid cormus), forming the body of the sponge; b) microscopic view of a cross section of the body; c) and d) enlarged view of the tube linings. Sample from the Bahamas.