Caloria indica feeding

September 9, 1998
From: John Hoover

Dear Dr. Rudman,

Do you know what Caloria indica feeds on? Hydroids, perhaps? C. militaris is supposed to feed on hydroids.

Thank you,

John Hoover
Honolulu, Hawaii
1 September 1998

Hoover, J., 1998 (Sep 9) Caloria indica feeding. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from

Dear John,
Most aeolids feed on hydroids or related cnidarians. As far as I know all the species in the "Phidiana" group of species do, although some tend to eat other nudibranchs if you keep them together in the same jar when collecting. I reported Phidiana indica from Tanzania feeding on the hydroid Salacia tetracythara (Lamouroux) (see Rudman,W.B., 1980: Zoological Journal of the Linnean Society, 68(2): 139-172) and Robilliard observed it feeding on the hydroid Pennaria in Hawaii (see Baba, K., 1969: Publications of the Seto Marine Biological Laboratory, 16(6): 399-403.)

If you are studying these animals perhaps you would like to let us know what you are doing .. Bill Rudman.

Rudman, W.B., 1998 (Sep 9). Comment on Caloria indica feeding by John Hoover. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from


Phidiana indica

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