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.
Lighthouse lizardfish
The lighthouse lizardfish is known to live in a marine environment within a depth range of about 2–100 meters. They are native to reef-associated locations within a tropical climate. The average length of the Synodus jaculum as an unsexed male is about 10 centimeters or 3.9 inches. The maximum recorded length of the Synodus jaculum as an unsexed male is about 20 centimeters or 7.87 inches. This species is identified by its brown colored body with the dark brown splotches. This species also has transparent fins. The lighthouse lizardfish is native to the areas of Indo-Pacific, East Africa, Marquesan, Society islands, north to the Izu Islands in Japan, south to New South Wales in Australia, Palau, and Kosrae in Micronesia. This species occupies coral reefs and it is found on sand or rubble near coral heads. This species of fish is caught and sold as fresh and salted in markets. It is also common to find this species isolated, in pairs, or in small groups.