Jellyfish
Although most jellyfish live well off the ocean floor and form part of the plankton, a few species are closely associated with the bottom for much of their lives and can be considered benthic. The upside-down jellyfish in the genus "Cassiopea" typically lie on the bottom of shallow lagoons where they sometimes pulsate gently with their umbrella top facing down. The tiny creeping jellyfish "Staurocladia" and "Eleutheria" cannot swim, and "walk" around on seaweed fronds or rocky bottoms on their tentacles. Most hydromedusae and scyphomedusae that live in coastal habitats find themselves on the bottom periodically, where they may stop swimming for a while, and certain box jellyfish species also rest on the sea bed in shallow water. Even some deep-sea species of hydromedusae and scyphomedusae are usually collected on or near the bottom. All of the stauromedusae are found attached to either seaweed or rocky or other firm material on the bottom.
Quillback rockfish
Quillback rockfish live along the Pacific coast from the Gulf of Alaska to the northern Channel Islands of Southern California. Like other rockfish species, quillbacks live on the bottom, perching on rocks or hiding in rock crevices. The juveniles stay mainly along the shore, in reefs, sand and eelgrass, while the adult rockfish live in the deeper waters. They are for the most part solitary dwellers, rarely being found in groups. They are rarely found in the open ocean, generally preferring to stay close to kelp, rocks, coral, or lodged in crevices or holes. Despite this, they are not territorial. High densities tend to coincide with peak plant growth. They occupy a variety of habitats in many different areas on the west coast of North America.