Observing the entocommensal ciliate fauna of sea urchins, Strongylocentrotus spp. - an exercise that illustrates the wonders of symbiosis.

摘要

Sea urchins worldwide are known for the entocommensal or endosymbiotic ciliate protozoa inhabiting their enteric (i.e. gut) fluids. The ease of collecting and dissecting urchins and observing the ciliates makes a simple but highly instructive class exercise for studying and appreciating the wonders of ciliates and marine symbiosis.