Echinoderms

Photo Synthesis

Category archives for Echinoderms

Crinoids on the night shift

Everyone knows that some terrestrial animals are active primarily at night and sleep most of the day, while others go about their business during daylight hours and rest when it’s dark. For some reason, many people are surprised to learn that the same thing holds true for animals that live in the sea. One of…

Crinoids, a class of marine animals in the phylum Echinodermata, are pretty creatures. The photo at right shows a crinoid perched on a Malaysian reef with its fluffy arms extended for feeding. Looking at the photo, it’s easy to see how they acquired their common name, Feather Stars. This is how divers usually see crinoids,…

Even the clearest water has at least some particles suspended in it — sand, silt, plankton, who knows what — and most of the time, in most places, the water isn’t really all that clear. In fact, during a plankton bloom or after a storm that has caused a lot of runoff, you might just…