Planula larva of the coral Pocillopora damicornis. Photo by Robert Richmond
Newly settled coral larvae may secrete a skeleton, but if conditions are poor, polyps may “bail out” and re-enter the water column, presumably with the ability to find a better place to settle. The arrow points to a polyp in the process of departing.
Sempers larva of a Zoanthellid, probably Palythoa sp., found on coral reefs (Order Zoanthidea, Phylum Cnidaria, usually colonial and anemone-like). Photo by Rudolph Scheltema
Sempers larva of Zoanthina (?) sp. (Order Zoanthidea, Phylum Cnidaria). Photo by Rudolph Scheltema
Planktotrophic larva of the hairy triton, Cymatium parthenopetum, a teleplanic larva found in the tropical Atlantic; adult on right. Photos by Rudolph Scheltema
Frontal view of veliger larva of the snail Cymatium nicobaricum, another teleplanic larva found in the tropical Atlantic. Photo by Rudolph Scheltema
Veliger larva of the eastern Pacific gastropod Fusitriton oregonensis, with adult on right. Photo of larva by Gregory Wray; adult to right
Egg case with developing embryos of the eastern Pacific gastropod Littorina scutulata. Photo by Gregory Wray
Larva of the open Pacific coast chiton Tonicella lineata. Photo by Christopher Lowe
Mesotroch larvae (left) of the polychaete Spirobranchus giganteus, whose adult lives in a calcareous tube on reef-building corals. Photos by Rudolph Scheltema, Robert Richmond (of adult)
Mitraria larva of an Owenid polychaete. Photo by Christopher Lowe
Larvae of five species of the polychaete Capitella capitata sibling species group. Photos by Kevin Ecklebarger
Nectochaete larva of a polychaete. Photo by Gregory Wray
Larva of Phoronid worm Phoronis vancouverensis. Photo by Gregory Wray
Left: Kamptozoan larva of the entoproct Loxosonella sp. Right: Adult. Photos by Gregory Wray
Cyphonautes larva of the bryozoan Membranipora sp. Photo by Gregory Wray
Disconiscid larva of an Articulate Brachiopod. Photo by Richard Strathman
Nauplius larva of unidentified crustacean. Photo by Christopher Lowe
Megalopa larva of the Shame-faced crab, Calappa sp., taken from the Gulf Stream, but adults are normally found in the Caribbean Sea. Photo by Rudolph Scheltema
Nauplius larva of a goose-necked barnacle species of Lepas, whose adult lives attached to floating objects. Adult on right. Photos by Rudolph Scheltema
Nauplius larva of the mud crab Rhithropanopeus harrisii in North Carolina. Larva has erectible spines (arrows), which make them difficult for predatory fishes to swallow. Photo by Steven G. Morgan
Ophiopluteus larva and adult (right) of the Pacific northwest brittle star Ophiopholis aculeata. Photo of larva by Christopher Lowe
Pluteus larva of the urchin Strongylocentrotus droebachiensis, San Juan Islands, Washington. Photo by Gregory Wray
Auricularia larva of the sea cucumber Parastichopus californicus. Photo by Gregory Wray
Auricularia larva of Luidia sp. Photo by Gregory Wray
Scanning electron micrograph of a brachiolaria larva of an unidentified asteroid sea star. Photo by Will Jaeckle
Newly metamorphosed Mediaster aequalis sea star. Photo by Christopher Lowe
Tadpole larva of the colonial tunicate Botryllus schlosseri. Photo by Richard Grosberg
Tadpole larva ot a Pacific northwest tunicate, Corella inflata, with “test cells” containing ammonium chloride in excess for buoyancy. Photo by Jon Havenhand
Newly settled and metamorphosed larva of the urchin Lytechinus sp.; Adult to Right. Left Photo by Russell Zimmer; Right Photo by Gregory Wray