Awesome Zoology Thing of the Day:

So, you see those little red and white splotchy things on these sea stars (Echinaster luzonicus)?  Are they flatworms?  Nudibranchs?  Nope.  They’re actually sessile, benthic ctenophores (Coeloplana astericola) living commensally on the surface of the starfish.  The filamentous white things you can see in some of the photos are the comb jelly’s feeding tentacles, lined with sticky cells called collocytes that are used to capture prey.  Wheeeeee! :D