Poecilosclerida Topsent 1928

A species of Ocenebra crawling over the cobalt sponge Acanthancora cyanocrypta, formerly Hymenamphiastra cyanocrypta.From SIMoN photo librarySpecies:Mollusk (unidentified)Cobalt sponge (Acanthancora cyanocrypta)Orange cup coral (Balanophyllia elegans)Location (General):CarmelSite (Specific):Pescadero WashrockDate taken:May, 05 2006Photo credit:Steve Lonhart / NOAA MBNMSPhotographer's comments:REEF dive

Chondrocladia virgata, Wyville Thomson.

Coelosphaera tubifex, Wyville Thomson.

Microciona prolifera. Older, branched form.

Esperiopsis quatsinonensid (found on the sea-beaches of Alaska).

Figure 6.Clathria (Microciona) armata. A Specimen on the surface of the coralligenous block B Large acanthostyle heads C Small acanthostyle D Subtylostyle with spined head E Palmate isochelae F Toxas of variable size, with smooth extremities.

Cobalt blue sponge (Acanthancora cyanocrypta), surrounding the cucumber Psolus chitinoidesOnce its bright red tentacles have been withdrawn, the cucumber Psolus chitinoides is difficult to see. It is surrounded by the cobalt sponge Acanthancora cyanocrypta, formerly Hymenamphiastra cyanocrypta.

Microciona prolifera. Incrusting specimen, with lobes; on oyster shells.

Figure 7.Clathria (Microciona) haplotoxa. A Specimen on the surface of a coralligenous block B Strongyle C Large acanthostyle D Small acanthostyle E Isochela F Toxa.

Microcoiona prolifera.

Figure 10.Forcepia (Leptolabis) brunnea. A Anisotylotes B Acanthostyles C Symmetric forceps D Asymmetric forceps E Large and small sigmas F Isochelae.

Figure 11.Hymedesmia (Hymedesmia) rissoi. A Tornote, sometimes modified into subtylotes and strongyles B Acanthostyles C Arcuate isochelae D Thin sigmas.

Figure 12.Mycale (Paresperella) serrulata. A–B Mycalostyles B Large anisochelae C Small anisochelae D Magnifications of the serrated edge of a sigma.