Strongylocentrotus purpuratus and Lytechinus pictus adults. Image by Jeff Hardin, Univ. of Wisconsin.

Many adult echinoderms can be kept in standard aquaria. Although adult echinoderms do not always seem very mobile, these three time lapse sequences show that adult echinoderms are far from sessile, using their tube feet for locomotion (courtesy Jan Ellenberg, EMBL, Heidelberg).

Adult L. variegatus (0.3 Mb) Bat star (Asterina miniata) adults (1.9 Mb) Bat stars (Asterina miniata) doing somersaults (0.75 Mb)

In addition to tube feet, another set of characteristic anatomical structure that echinoderms possess are pedicillaria, small pincer-like appendages that echinoderms use in a variety of ways. This movie, from a collection hosted by Christian Sardet (BioMarCell, CNRS, Villefranche-sur-Mer), and provided by Christian Gache and Thierry Lepage (CNRS, Villefranche-sur-Mer) shows pedicallaria in Paracentrotus lividus.

Pedicillaria in motion (.mpg; 1.3 Mb)