It is quite doubtful that any Crinoid we saw was not home to a commensal shrimp or crab and in this case, both. Although not an exact match, these animals blend in well enough to find safety within the Crinoid's numerous arms. The crab is Allogalathea elegans, 15mm, and the shrimp Laomenes sp., 10mm.
6 November 2012