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Beautiful nudibranch making its way across healthy coral reef

Sea snail banded dye-murex (Hexaplex trunculus) eggs close-up undersea, Aegean Sea, Greece, Halkidiki

The scyphostoma larva (the fixed polyp-like stage in the life cycle of a jellyfish, which reproduces asexually) of Nausithoe punctata bears a striking superficial resemblance to a hydroid and it lives commensal within sponges. This hydroid-like larva forms a branching tree-like growth within the body of the sponge, the polyp mouths and their tentacles projecting out of the oscula (mouthlike aperture) of the sponge. The mouth of the polypite is surrounded by an annulus of about 40 solid filiform tentacles. The ephyra (immature medusa stage) of Nausithoe arise by strobilization (asexual reproduction by division into segments) from this larva. The young ephyra has only 4 gastric filaments and no tentacles. The species occurs in the North Atlantic Ocean in the Mediterranean Sea and circumglobal in warm waters. Max. diameter of adult Nausithoe punctata is 1.5cm. Many Brittle at the sponge. Palau, Iro Wreck 7°17'39.7 N 134°25'15.18 E at 10m depth

Dreissena is a genus of small freshwater mussels in the family Dreissenidae in the class Bivalvia. They are found attached to firm substrates by threads from underneath the shells and are the only freshwater bivalves to attach to hard substrates in high densities while having a planktonic larval stage.

Sea life Salp and Orange Gorgonian coral from scuba diver point of view

Black band disease on Pavona decussata.Leaf coral is sick with black band disease.

The underwater life of Flower Garden Banks National Marine Sanctuary, Texas

Aplysina fistularis, also known as the yellow tube sponge is a species of sea sponge in the order Verongiida.

Balanophyllia elegans, the orange coral or orange cup coral, is a species of solitary cup coral, a stony coral in the family Dendrophylliidae. An azooxanthellate species, it does not contain symbiotic dinoflagellates in its tissues. Monterey Bay, California.

European thorny oyster (Spondylus gaederopus) coveded by oyster sponge or orange-red encrusting sponge (Crambe crambe) undersea, Aegean Sea, Greece, Halkidiki

$In large aggregations, Yellow Sea Cucumbers Colochirus robustus are often misidentified as corals. Colochirus robustus occurs in the tropical Central Indo-Pacific in a depth range from 1-25m, max. length 7cm. When feeding, the species extends the branchy feeding arms into the current. There are multiple reproduction options; instead of spawning, when getting large, the species can split into two: In a few days, the head end is ready to leave, whilst the rear end takes about a week to grow an own head! \nThese specimen aggregate on an old whip coral overgrown by sponges, hydroids and ascidians. \nTriton Bay, Indonesia \n3°55'0.858 S 134°6'6.102 E at 12m depth$

Bubble algae Valonia ventricosa, surrounded by marine life, underwater Caribbean sea

White nudibranch eggs. Close up Abstract. Exploring and enjoying Beautiful Sea Life macro . Underwater scene at clear mediterranean sea. Scuba diver point of view. Greece Europe. Underwater photography

White frog fish from close in pink coral, night dive, bunaken Sulawesi, Indonesia

Lampreys are primitive fish devoid of jaw and parasitic habits. In the mouth, it is disc-shaped and functions as a suction cup.

Urechis caupo is a species of spoon worm in the family Urechidae, commonly known as the innkeeper echiuran, the fat innkeeper worm, the innkeeper worm, or the penis fish. Monterey Bay, Monterey, California. Echiura.

Black leather sponge (Sarcotragus spinosulus) extreme close-up undersea, Aegean Sea, Greece, Halkidiki

Ochridaspongia rotunda is freshwater sponge endemic to Lake Ohrid. This sponge is found mostly at depths of 30–50 m and water temperatures of 6–8 °C. Its circular shape indicates the animal lives under conditions of relatively calm water.

Sea life Underwater sea star - starfish Scuba diver point of view

Bearded Fireworm off the coast of the island of Roatan

$Jorunna funebris or Ringed Dorid or Polka-dot Nudibranch Jorunna funebris occurs in the tropical and temperate Indo-Pacific. Jorunna funebris is a species of sea slug, a dorid nudibranch, a shell-less marine opisthobranch gastropod mollusk in the family Dorididae. \nAdult Jorunna funebris can vary from 15 mm to over 70 mm long, with an average length of 35 mm. The species feeds on the blue Haliclona Sponge, other observations about feeding preference identified other sponges like blue Euplacella cf. australis, blue Xestospongia sp. and Oceanapia sp., uses undigested food remains as a chemical defence. They are sequested into the jorumycin cyctotoxin, being found in the mucus of the Nudibranch. It follows this logic: I am very conspicuous and cannot escape. If you don't eat me, we'll BOTH live longer!\nTriton Bay, Kaimana Regency, Indonesia, \n3°51'48.03 S 133°55'48.96 E at 4m depth by night$

Spherical red sponge with clearly visible yellowish osculum.

Gumboot Chiton, Cryptochiton stelleri, Monterey Bay, Monterey, California; Mollusca; Polyplacophora; Acanthochitonidae. The giant western fiery chiton or giant Pacific chiton, is the largest of the chitons. It is found along the shores of the northern Pacific Ocean .

Bryozoa or moss animal Schizomavella (Schizomavella) linearis undersea, Aegean Sea, Greece, Halkidiki

Oolong tea in the food processor view from above

Aged fruit bodies of a slime mold, or myxomycete, Physarum polycephalum, has released the spores out. Slime moulds are special organisms that gather from many microscopic unicellular amoebae

Aplysia punctata - Sea hares Scuba diving Exploring and enjoying in sea life. Scuba diver point of view

Free Images: "bestof:Cryptodromia pileifora, with the commensal sponge beneath which it shelters; seen from the under surface The last two pairs of.jpeg check categories 23 August"

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