Larval Leaf Scorpionfish (photograph by Chris Newbert, Minden Pictures). Lacking any other defense, many larval fish have adapted transparency as a method of camouflage—such as this tiny, see-through larval leaf scorpionfish in Hawaii.
Last week, the IUCN 2009 Seamount expedition ended, with scientists sampling two final seamounts in the Indian Ocean. Caught at was this deep-sea anglerfish, also known as a seatoad. Sarah Gotheil From BBC news
Marine planktonic polychaete worms, genus Tomopteris, are relatively transparent until they shine a deep bioluminescent blue. One species, Tomopteris nisseni, is one of the few creatures on the planet to produce yellow bioluminescence.