Tenellia acinosa (Risbec, 1928)

Tenellia acinosa is known from the Marshalls from two specimens found together on the Medren Pier pilings on Enewetak Atoll, and two more from Kwajalein that we think are the same. There is, however, some question about the identification. The Enewetak specimens were at a depth of 2 meters and measured 13 and 10mm long. The larger of these is figured in the first photo below. Cuthona sp. 19 in Gosliner et al (2008) looks very similar, although it differs a bit in rhinophore and cephalic tentacle coloration.

The photo below shows the first individual found at Kwajalein Atoll. While it looks basically the same, the cerata are more inflated and spotted with white, and the rhinophores are considerably larger with a more inflated look as well.

The specimen below was found in the lagoon Halimeda beds at Kwajalein on 17 February 2008 at a depth of about 8 meters. The rhinophores of this specimen are extremely long. It would seem they have the ability to stretch them out.

The next specimen (four photos) was found at a depth of about 7m on the top of a Halimeda plant at night on a Kwajalein Atoll lagoon reef on 18 July 2009.

Created 8 January 2007
Updated 17 March 2017

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