An enormous sea anemone from 2500m depth on the East Pacific Rise was reported in in the journal Marine Biology. The monstrous actiniarian Boloceroides daphneae is abundant on boulders, cliffs, and rocky outcrops near hydrothermal vent sites but not on them, writes author Marymegan Daly from Ohio State University. The largest living specimen she found had a column diameter of 1m, a tentacle crown of 2m diameter, and tentacles trailing an estimated 3m and more. That's just downright dangerous. B. daphneae's closest living relative is the comparatively diminutive Cerianthid anemone found in warmer coastal waters.