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Underwater close-up photography of a dorid nudibranch.\nDivesite: Pulau Bangka (North Sulawesi/Indonesia)
Phidiana hiltoni is a species of sea slug, an aeolid nudibranch, a shell-less marine gastropod mollusc in the family Facelinidae.  Hilton's Aeoli or Hilton's Nudibranch. Duxbury Reef State Marine Conservation Area; Marin County; California.
A white nudibranch on a rock
Goldfish swimming in the water with a black background photographed in Chengdu
Eggs from a nudibranch attached to a tiny branch
The Nudibranch Phyllodesmium briareum, the bushy Phyllodesmium, is not always easy to find. The camouflage is often perfect as this species looks like the soft coral Briareum violaceum with which it is often found nestled between or crawling over the polyps of the soft coral it is feeding on.The cerata have conventional aeolid shape, but like other Phyllodesmium species they contain zooxanthellae (can be seen as lines of brown specks). The species occurs in tropical Indo-West Pacific in a depth range from 8-20m, max. size 25mm. North West of Sangeang Island, Indonesia, near Sumbawa, 8°8'11\
Upside-down jellyfish - Cassiopea andromeda - mangrove jellyfish symbiotic with algae, lying on the bottom in a bright place for photosynthesis by microalgae
Sea life Salp  Glass sponge, and Orange Sea sponge from scuba diver point of view
A Opalescent Nudibranch (Hermissenda crassicornis) on kelp, feeding on Bryozoans. There are some very small sea snails in front of the nudibranch. Photographed at Calvert Islands, in British Columbia.\n\nOpalescent Nudibranch is one the most beautiful and abundant species of nudibranch in British Columbia.
Close up of lion's mane nudibranch or sea slug, Melibe leonina, on kelp leaf.
Sipho of a zebra mussel (Dreisena polymorpha)
Ptilosarcus gurneyi, the orange sea pen or fleshy sea pen, is a species of sea pen in the family Pennatulidae. It is native to the northeastern Pacific Ocean where it lives in deep water anchored by its base in sand or mud. It has received its common name because of its resemblance to a quill in a bottle of ink. Monterey Bay, California.
A close up of a white nudibranch
Jorunna funebris or Ringed Dorid or Polka-dot Nudibranch Jorunna funebris occurs in the tropical and temperate Indo-Pacific. Jorunna funebris is a species of sea slug, a dorid nudibranch, a shell-less marine opisthobranch gastropod mollusk in the family Dorididae. \nAdult Jorunna funebris can vary from 15 mm to over 70 mm long, with an average length of 35 mm. The species feeds on the blue Haliclona Sponge, other observations about feeding preference identified other sponges like blue Euplacella cf. australis, blue Xestospongia sp. and Oceanapia sp., uses undigested food remains as a chemical defence. They are sequested into the jorumycin cyctotoxin, being found in the mucus of the Nudibranch. It follows this logic: I am very conspicuous and cannot escape. If you don't eat me, we'll BOTH live longer!\nTriton Bay, Kaimana Regency, Indonesia, \n3°51'48.03 S 133°55'48.96 E at 4m depth by night
Bobbit worm
Abstract Sea life worm Spiral tubeworm Underwater beauty Scuba diver point of view
Naked sea butterfly swimming near the surface in the St.Lawrence Estuary in Canada
Aiptasia couchii, Cnidarians from Cala La Fosca, Palamós. Costa Brava
Fjordia lineata on an open mussel
Brown hydra, Hydra oligactis, with ingested mosquito larva. Specks in background are bacteria. Fresh water, Diamond Lake, Oregon, USA. Live specimen, wet mount, 2.5X, oblique reflected illumination.
Portrait of a weird nudibracnch.\nDue to its translucent body and network of brown tubules across its body, it looks like a pile of strings or a string of snot in the water. To be able to take a photo of this sea slug, different kinds of lighting the subject had to be tested. \nIts strange appearance has made it to be the holy grail of nudibranchs.\nRomblon, Philippines.
Tropical aquarium, tropical waters sea anemone macro close up tentacles
Melibe Colemani Nudibranch
Underwater Sea Life Nudibranch Scuba diver point of view
Nudibranch (sea slug) - Melibe viridis looking for prey on the sea bottom. Underwater macro life of Tulamben, Bali, Indonesia.
Psolus chitonoides, also known as the slipper sea cucumber, armoured sea cucumber, creeping armoured sea cucumber, or creeping pedal sea cucumber. Monterey County, California. Underwater.
A red gilled nudibranch on a kelp leaf
Colonial Ascidian Didemnum psammatodes is native to Northern Australia and other tropical and subtropical regions in the Indo-West Pacific in a depth range from 1-15m. \nThe species is introduced to the Atlantic where it was first recorded in Guadeloupe in 1980-1981. Since then it has been reported in several areas, probably transported to the Atlantic through shipping and hull fouling.\nThe scattered large exhalant openings are distinctive for that species. As a filter feeder, Didemnum psammatodes is not eating but just overgrowing the coral. \nTriton Bay, West Papua Province, Indonesia, \n3°54'3.384 S 134°6'26.448 E at 16m depth
upside down jellyfish
Close up of frilly plumose anemone, Metridium senile.
Free Images: "bestof:Melibe leonina, Big Sur.jpg en An extraordinary density of the hooded nudibranch Melibe leonina The hoods of these predatory sea slugs exceeded 15 cm in"
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