Christmas tree hydroid – Idroide piumato

Pennaria disticha, also known as the Christmas tree hydroid, is a species of athecate hydroid in the family Pennariidae. Colonies are common in the Mediterranean Sea growing on rocks close to the surface. This species has been used in research into prey capture. Colonies of Pennaria disticha consist of numerous much-branched stems up to 30 cm high. The branching system is alternate.

Titan triggerfish Balestra titano

The Titan triggerfish, Giant triggerfish or Moustache triggerfish (Balistoides viridescens) is a large species of triggerfish found in lagoons and at reefs to depths of 50 m. in most of the Indo-Pacific region. Is diurnal and solitary fish. It feeds on sea urchins, molluscs, crustaceans, tube worms, and coral. It often feeds by turning over rocks, stirring up sand and biting off pieces of branching coral.

Arothron stellatus

Starry Toadfish, Arothron stellatus, also known as the stellate puffer, starry puffer or starry pufferfish is a very large pufferfish which grows up to 120 cm. in length. The background coloration goes from white to grey, and the body is harmoniously dotted with black spots. The ventral area is usually clearer. The size of the spots is inversely proportional to the size of the fish.

Blue damselfish

Even in this summer of 2025, like every summer, we witness the birth and growth of the Black Damselfish, Chromis chromis, the only one of its kind Pomacentridi - Pomacentridae - in the Mediterranean Sea. In these sequences we see it in its shining electric blue livery, when the little fish are still small, a few weeks after the hatching of the eggs laid in winter, spring by the females and guarded by the male until the birth ...

Coral reef in Oslob Philippines

The video you are watching was taken in a coral reef in Oslob, Philippines. The coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate. Most coral reefs are built from stony corals, whose polyps cluster in groups. Coral belongs to the class Anthozoa the animal phylum Cnidaria, which includes sea anemones and jellyfish.

Bothus ocellatus

The species is found on or near the sandy seabed in relatively shallow waters in the western Atlantic Ocean, the Caribbean Sea and the Gulf of Mexico, its range extending from Canada to southern Brazil. Its typical habitat is sandy flats in the vicinity of patch reefs, often near areas of coral rubble and seagrass meadows. It commonly occurs at depths down to about 50 m but is sometimes found at greater depths, down to 110 m.

Blow lugworm egg Arenicola marina

The blow lugworm (Arenicola marina), also known as sandworm, is a large species of marine worm. Its coiled castins are a familiar sight on a beach at low tide but the animal itself is rarely seen except by those who, from curiosity or to use as fishing bait, dig the worm out of the sand. In the video I made you can see a egg blow lugworm, Arenicola marina, anchored to the Mediterranean sea floor at about 40 cm depth.

Moorish idol

The Moorish idol (Zanclus cornutus) is a marine fish species, the sole extant representative of the family Zanclidae in order Acanthuriformes. A common inhabitant of tropical to subtropical reefs and lagoons, the Moorish idol is notable for its wide distribution throughout the Indo-Pacific. A number of butterflyfishes (genus Heniochus) closely resemble the Moorish idol.

Pempheris oualensis Sweeper fish

Sweepers, Pempheris oualensis, are small, tropical marine (occasionally brackish) perciformes fish of the family Pempheridae. Found in the western Atlantic Ocean and Indo-Pacific region, the family contains about 26 species in two genera. One species (Pempheris xanthoptera) is the target of subsistence fisheries in Japan, where the fish is much enjoyed for its taste.

Astrospartus mediterraneus

In the video I made you can see it with the almost complete opening of the arms because even though it was made during the day, I was at a depth of over 80 meters where the light is very attenuated. Beautiful and elegant, when it is open, it seems to see a refined female embroidery lying on the Red Gorgonia enhancing the beauty of the images presented to the diver.

Plectorhinchus orientalis

The Indian Ocean oriental sweetlips inhabits shallow coastal coral reefs, lagoons and seaward reefs at depths of 2 to 25 m. It is found singly or in small aggregations and is tends to be nocturnal. The juveniles may be found in tidepools and in beds of sea grass. It forages at night feeding on small invertebrates such crustaceans, gastropods or annelids, as well as smaller fishes.

Zebra tang

Il Pesce Chirurgo zebrato, Acanthurus polyzona, è un pesce appartenente alla famiglia Acanthuridae. La specie è nota solo in poche località dell'Oceano Indiano occidentale. Vive nelle barriere coralline ed è facile incontrarlo nella parte esterna delle barriere; in fase giovanile è facile incontrarlo, come in questo caso, nelle acque basse delle lagune. Si può trovare fino a 15 metri di profondità.

Monodactylus argenteus

Monodactylus argenteus is a species of fish in the family Monodactylidae, the moonyfishes. Its common names include silver moonyfish, or silver moony, butter bream, and diamondfish. It is native to the western Pacific and Indian Oceans, including the Persian Gulf, Red Sea, and associated estuaries, such as the Mekong Delta. It is bright shiny silver with yellowish edges to the fins.

Mauve Stinger Pelagia noctiluca

Pelagia noctiluca is ajellyfish in the family Pelagiidae. It is typically known in English as the mauve stinger, but other common names are purple-striped jelly (causing potential confusion with chrysaora colorata), purple stinger, purple jellyfish, luminous jellyfish and night-light jellyfish. Pelagia noctiluca can be described as a marine organism with the ability to glow in the dark (bioluminescence). It is found worldwide in tropical and warm temperate seas.

Black Feather starfish

I Crinoidi (Crinoidea) sono una classe di echinodermi comunemente noti come gigli di mare o stelle marine piumate Si nutrono di plancton che catturano con le loro braccia simili a piume. Le braccia sono sollevate a formare un ventaglio che viene tenuto perpendicolare alla corrente. I crinoidi sono mobili e si spostano per ancorarsi su rocce, su rami di corallo o preferibilmente sulle Gorgonie per massimizzare le loro opportunità di alimentazione.

Sarcophyton ehrenbergi and Sarcophyton trocheliophorum

Sarcophyton ehrenbergi and Sarcophyton trocheliophorum are a octocorals of the Alcyoniidae family. It is composed of tiny polyps projecting from a shared leathery tissue. Members of the family may have two kinds of polyps; the autozooids have long trunks and eight tiny branched tentacles and project from the shared leathery tissue while the siphonozooids remain below the surface and pump water for the colony.

Humpback Whales of Samaná

I went to the Samaná Peninsula, in Santo Domingo, to film the Humpback Whales in one of the world's breeding grounds for these whales. During this period, the Humpback Whales stay until the welps acquire, after the nursing period, their autonomy, but above all to protect them from the Orcas, their main predators. During winter and early spring, humpback whale watching is increasingly becoming an important income-generating activity for the province.

Octopus in den

In this short video we show you a "crafty octopus". That these animals are very intelligent is now well known to everyone; in this case the octopus he are organized itself with two dens close to each other. But if we carefully observe the video we can think that it is the same den with two exits, the main one and the secondary one that could be the "emergency exit".

Goldspotted Rabbitfish

Goldspotted Rabbitfish, Siganus punctatus, or goldspotted spinefoot, punctuated spinefoot, spotted rabbitfish, spotted spinefoot, yellow-spotted spinefoot, is a species of marine ray-finned fish, a rabbitfish belonging to the family Siganidae. It occurs in the Indo-West Pacific region. It occurs down to 40 m. in depth in clear lagoons and on seaward reefs as adults while the juveniles school in estuaries.

Red-breasted Wrasse

The Red-breasted wrasse (Cheilinus fasciatus) belongs Actinopterygii class, Labriformes order,Labridae family. It lives in the lagoons and coral reefs of the Atlantic Ocean, the Indian Ocean and the Red Sea.Young people prefer areas with a lot of aquatic vegetation, adults are often found in areas rich in corals and with sandy bottoms. It can be found up to 60 m deep.

Special mission mediterranean Spiny Lobster

It is late August and Summer is the period in which many marine organisms prepare for procreation. We have therefore decided to reach a deep Mediterranean coral reef, over 7 miles from the coast. The procreation have pushed these crustaceans to gather at the same time and in the same place. Procreation, in fact, occurs at the end of the Summer and in the Winter the larvae are born, which immediately reach the seabed that will host them for the rest of their lives.

Blue-barred parrotfish

Blue-barred parrotfish, Scarus ghobban, is a species of marine ray-finned fish in the family Scaridae. This species is blue-green to green in colour and commonly grows to approximately 46 cm. Its appearance is variable. It may have a central stripe on the dorsal and anal fins that is pink in color. The underside of the body may be pinkish or yellowish.

School of Smallspotted Dart

The Small Spotted Dart can reach a maximum length of 60 cm in males and a maximum weight of 1,5 Kg. The body color varies from silvery blue to grey above, with some small black spots on the flanks. The number of these spots increases with age. This fish is silvery white below. It has large, strong fins, a forked tail, and a narrow base.

Spotted Eagle Ray

The Spotted Eagle Ray, (Aetobatus narinari), is a cartilagionus fish of the eagle ray family, Myliobatidae. As traditionally recognized, it is found globally in tropical regions, including the Atlantic, pacific and Indian Oceans. Spotted eagle rays are most commonly seen alone, but occasionally swim in groups. They are ovoviviparous, the female retaining the eggs then releasing the young as miniature versions of the parent. This ray can be identified by its dark dorsal surface covered in white spots or rings.

Horned Sea Star

The Horned Sea Star, Protoreaster nodosus, commonly known as chocolate chip sea star, is a species of sea star found in the warm, shallow waters of the Indo-Pacific region. They are sometimes seen in the marine aquarium trade or dried and sold as curios. The sea stars are usually colored in shades of red or brown, but can be light tan, the color of cookie dough. This appearance, combined with the small horns on its dorsal side, give the sea star a look similar to that of a bumpy cookie.

European Lobster

European lobster, Homarus Gammarus, known as the Common Lobster, belongs crustaceans class; it has a body completely covered by a robust shell with two large claws, different from each other, one more stocky and massive and one more sharp and slender. In front of the mouth it has six antennas as organs of touch, the thorax is smooth with four pairs of legs and the abdomen ends with a fan-shaped tail. The color is an intense blue marbled with yellow and white.

Rhinecanthus verrucosus

The blackbelly triggerfish is a territorial species and defends its territory against other triggerfish including the lagoon triggerfish (Rhinecanthus aculeatus). Its habitat in lagoons and reef flats where it favours areas with seaweed, corals, seagrasses, sandy flats, and stony places. It may move from place to place according to the status of the tide.

Convict Surgeonfish

Acanthurus triostegus, also known as the convict tang, convict surgeonfish, or manini, is a small surgeonfish in family Acanthuridae of the order Perciformes. It is typically about 17 cm long, but some individuals may reach 27 cm. These tangs are widespread. They are found in the Indo-Pacific area. It is found over hard bottoms in lagoons, reef slopes, bays and estuaries.

Peltodoris atromaculata Reproduction

When we explore our underwater reefs we are often amazed by the number of species that we find in a few square meters and as in this case even in a few square centimeters. We have said it many times that biodiversity makes a habitat and an ecosystem more stable, solid and long-lasting. Often we fail to realize the quantity of different species that live next to each other and obviously it is almost impossible to know and recognize them all.

Cardinalfish

Cardinalfish, Apogon imberbis, or Mediterranean cardinalfish, king of the mullets, is a species of ray-finned fish, a cardinalfish belonging to the family Apogonidae. It is widely distributed in the Mediterranean and along the warm temperate and tropical eastern Atlantic coasts

Pesce Mezzobecco

The Dussumier's halfbeak (Hyporhamphus dussumieri), also known as the slender garfish, lives in reefs and shallow lagoons. It is an Indo-Pacific species which is found from the Seychelles east to the Tuamotu islands, north to Hong Kong and Okinawa and south to northern Australia. They form schools which are found near the surface of lagoons and seaward reefs.

Tree Sponge or Branched Sponge – Axinella polypoides

In this dive on a seabed of about 40-42 meters deep we encountered the Tree Sponge or Branched Sponge, Axinella polypoides, a sponge typical of the Mediterranean Sea that develops vertically often with various branches almost like a coral. Branched sponge Spugna alberello Spugna ramificata Axinella intotheblue.it ...

Cetriolo di Mare tropicale

Graeffe's sea cucumber tropical is a scavanger and roams around on the seabed sifting through the sediment with its feeding tentacles. Any organic matter it finds is passed to its mouth by the tentacles. Its daily activities start within a few minutes of dawn and continue until half an hour after sunset after which time it adopts an inactive stance with its rear end raised and its tentacles retracted into its mouth.

Redang Island Malaysia Turtle Sanctuary

This video was made on the island of Redang in Malaysia during a boat trip to go to the famous Turtle Sanctuary: in fact, in certain periods of the year many turtles reach this location to lay their eggs. They have thus also become a tourist attraction and are so used to the presence of man that they allow themselves to be approached very easily.

Striped Eel Catfish

Striped Eel Catfish, is a species of eeltail catfishes belonging to the family Plotosidae. Like most other members of the genus Plotosus. they possesses highly venomous spines that they can use to sting when threatened. The venom can cause mild to severe symptoms in humans.

Yellowback Fusilier

The Yellowback Fusilier (Caesio xanthonota) is a pelagic marine ray-finned fish, a fusilier belonging to the family Caesionidae. It is native to the tropical Indo-Pacific, being found in shallow water from the East African coast to Indonesia.