Didemnum psammatodes

Figure 2 A # 0151 A; # 1168 b; # 3850 C, more spicules than usual; # IT 65; # DR 70; # IT 88; # SD 84, no sample taken; # IT 94, Cyrene patch reef, not collected. Distinguished by the brownish-grey color of the tunic due to the presence of dense fecal pellets. The spicules are small and sparse, restricted to a narrow region around the oral siphons (small white clumps in photo). They tend to dissolve easily in fixatives even though buffered. Occurs in all tropical waters worldwide including China, Indonesia, Philippines, New Caledonia, Papua New Guinea, Fiji, Palau, Tonga, Guam, Red Sea, Persian Gulf, East & South Africa, Australia, Ifaluk, Japan, Hawaii, Guadeloupe, SE Brazil, Panama (Caribbean), French Guiana, Gulf of Mexico, Florida. Detailed references with figures: Tokioka (1953 as D. fuscus, 1967 as D. dorotuba), Eldredge (1967), Monniot F. (1983), Kott (2001), Mohadassi et al. (2019). Other references: Kott (1981, 1998), Goodbody (1984), Monniot C. & Monniot F. (1994), Monniot F. (1995), Rocha & Monniot (1995), Monniot F. & Monniot C. (1996, 2001), Monniot C. et al. (2001), Lambert (2003), Rocha et al. (2005), Monniot F. (2016).