Parastichopus californicus escapes predation by the sunflower seastar Pycnopodia helianthoides. By releasing itself on the approach of the seastar the Parastichopus can be carried away by the current. Also shown are the escape responses of sea urchins and topshells.
Daily Archives: Sunday,June 6, 2004
California Sea cucumber reproduction
This California Sea Cucumber male was emitting sperm while in the tank at Race Rocks in early June, 2004 . This went on for several hours. Millions of sperm are broadcast into the water where they may have a chance encounter with eggs, also released into the current by the females. Of the great numbers of eggs and sperm released only a few are fertilized and actually make it to maturity. This is a good example of
r-selection in the population.