A little jelly in the morning... This pelagic moon jelly was photographed next to the prolific encrusted sponge backdrop at Bird Rock in Cabo San Lucas. Sometimes appearing in dense congregations, these jellies, as is the case with most Cnidarians, possess nematocysts (stinging cells). This adaptation allows the moon jelly to be an effective predator. The trailing tentacles armed with nematocysts enable the jelly to incapacitate its prey, which may include copepods, krill, larval fish, and other zooplanktonic species. The grace at which the jelly moves through the water column by pulsating its bell can only be compared to a well-orchestrated ballet...