andrewcowley's picture

Amphipod comensual on anemone

Observed: 25th September 2010 By: andrewcowleyandrewcowley’s reputation in Invertebratesandrewcowley’s reputation in Invertebrates
anemone-comensual-amphipod-01
anemone-01
Description:

Amphipod comensual on an anemone, possibly Anthopleura balli (Cocks). Under a large stone on the lower shore.

Identifications

No identification made yet.

Species interactions

No interactions present.

Comments

Mike Kendall's picture

Identifying amphipods

Amphipods are difficult enough to identify when looking down a microscope because, to follow the keys, most of the anatomical features that need to be examined are very small; some of these are best viewed after micro-dissection.

While some of the larger animals can be identified to family with a good macro image I'm afraid this isn't one. There is a large eye,the antennae seem to be similar in length and there is a well developed gnathopod so it might be a gammarid but I can't see the critical features that would confirm.
An interactive, on-line key to amphipod families that uses the Intkey program can be found at

http://www.crustacea.net/crustace/www/amphipod.htm

Mike Kendall