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Whale Shark, Philippines. Photo by Stephane Rochon.

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13:59

Punta de la Mona
Spain
Sea snails and electric flame scallop. Part 17 of my documentary, "Mucky Secrets", about the fascinating marine creatures of the Lembeh Strait in Indonesia. Watch the full 90-minute documentary at http://www.youtube.com/watch?v=nJMZ6reOB0E As we continue to examine molluscs (mollusks, Mollusca) in this documentary series, we take a quick look at the electric flame scallop (Ctenoides ales), otherwise known as the "disco clam", "fire clam" or "electric clam". The flame scallop is a type of bivalve (Bivalvia). It appears to emit luminescent electrical pulses, but actually it is rolling and unrolling the edges of its mantle, revealing special particles that simply reflect light. The display is thought to attract phytoplankton as food and perhaps frighten off predators like crabs and shrimps. We then turn our attention to sea snail (gastropods, Gastropoda). The grey bonnet (Phalium glaucum) is a typical sea snail. It has a protective, coiled shell that it can withdraw its entire body into. It glides over the substrate on its large, muscular foot, and at the rear we see the operculum, a hard lid that is used to close the opening of the shell after the snail withdraws into it. Two simple eyes peer out from under the front of the shell, and important sensory feedback also comes from the two tentacles. To one side is the inhalent siphon, a tube that the sea snail uses to draw in water for respiration. The anatomy of another gastropod, the vomer conch (Euprotomus vomer), is different. Its mouth is much more obvious, at the end of a long protrusion called a proboscis. It is strictly a herbivore, and it uses the proboscis for locating and eating algae growing in the sand. It's eyes are much more prominent too, at the end of long stalks, and jutting out from these stalks are two highly sensitive tentacles. Rather than gliding, it uses its operculum to drag itself along the bottom in a lurching motion. Conchs are a popular food, and their shells have symbolic and religious significance in some cultures. They have been used for everything from musical instruments, to weapons, to ink holders. We then encounter a whitespotted hermit crab inhabiting an empty cone shell. The main sensory device of cones like the ivory cone (Conus eburneus) is the siphon itself which contains highly sensitive chemoreceptors. If it detects suitable prey the cone will unleash a harpoon from its proboscis containing a highly venomous neurotoxin, powerful enough to kill humans. There are English captions showing either the full narration or the common and scientific names of the marine life, along with the dive site names. The full Mucky Secrets nature documentary features a huge diversity of weird and wonderful marine animals including frogfish, nudibranchs, scorpionfish, crabs, shrimps, moray eels, seahorses, octopus, cuttlefish etc.. Thanks to Kevin MacLeod of http://www.incompetech.com for the music track, "Scheming Weasel (slower version)", which is licensed under a Creative Commons Attribution 3.0 Unported license. Thanks to the staff and keen-eyed divemasters of Two Fish Divers (http://www.twofishdivers.com), for accommodation, diving services and critter-spotting. The video was shot by Nick Hope with a Sony HVR-Z1P HDV camera in a Light & Motion Bluefin HD housing with Light & Motion Elite lights and a flat port. A Century +3.5 diopter was used for the most of the macro footage. I have more scuba diving videos and underwater footage on my website at: http://www.bubblevision.com I post updates about my videos here: http://www.facebook.com/bubblevision http://google.com/+bubblevision http://www.twitter.com/nicholashope http://bubblevision.tumblr.com Full list of marine life and dive sites featured in this video: 00:00 Flame Scallop, Ctenoides ales, Nudi Retreat 00:29 Grey Bonnet, Phalium glaucum, TK 2 01:23 Vomer Conch, Euprotomus vomer, Jahir 02:28 White-spotted Hermit Crab, Dardanus megistos, Two Fish Divers house reef 02:40 Ivory Cone, Conus eburneus, TK 2 03:03 Nudibranchs, Hypselodoris bullocki & Glossodoris cincta, Aer Perang 03:08 Nudibranch, Doto sp., Nudi Retreat 03:33

Teluk Kembahu 2
Indonesia
Boxfishes, puffers and porcupinefishes. Part 12 of my documentary, "Mucky Secrets", about the fascinating marine creatures of the Lembeh Strait in Indonesia. Watch the full 90-minute documentary at http://www.youtube.com/watch?v=nJMZ6reOB0E In this video I look at fishes in the order Tetraodontiformes. First of all we encounter a very young boxfish, possibly a longhorn cowfish, Lactoria cornuta. Along with toxic skin, the boxfish's main defence is a very hard carapace of bony plates. The juvenile's coloration helps it remain unnoticed while the body hardens. Next is a juvenile thornback cowfish, Lactoria fornasini, sheltering in Halimeda algae. Juvenile boxfishes and pufferfishes often tuck their tail to one side when it is not needed for swimming. Next we meet a juvenile starry puffer, Arothron stellatus, and its dramatically different adult counterpart. Although puffers are slow movers, the tail can give them a great turn of speed when threatened. As a further defence, puffers can inflate their bodies with water, vastly increasing their size and revealing short, sharp spines on their skin. They are believed to be the second most poisonous vertebrate on earth, after the golden poison frog. However some predators can tolerate the toxin, and some parts of them are carefully prepared as a delicacy in Japan, Korea and China. The juvenile guineafowl puffer, Arothron meleagris, has a black and yellow coloration that advertises its toxicity to potential predators. This is a common combination of warning colors in the animal kingdom. More elongate puffers are found in the Lembeh Strait too. We encounter a narrow-lined puffer, Arothron manilensis, at Hairball and a shortfin puffer, Torquigener brevipinnis, at TK. Sharpnose puffers, also known as tobies, have elongated snouts and slimmer bodies. We meet at a Valentini puffer, Canthigaster valentini, a Bennett's sharpnose puffer, Canthigaster bennetti, and a compressed toby, Canthigaster compressa. The birdbeak burrfish, Cyclichthys orbicularis, is a type of porcupinefish. It is covered in spines which are permanently erect, and it can inflate its body like puffers. It's eyes contain iridescent green specks. Conversely, the spines of the long-spine porcupinefish, Diodon holocanthus, lie flat against its body when not it is not inflated. Finally we encounter a long-spine porcupinefish sharing its home with a small birdbeak burrfish. There are English captions showing either the full narration or the common and scientific names of the marine life, along with the dive site names. The full Mucky Secrets nature documentary features a huge diversity of weird and wonderful marine animals including frogfish, nudibranchs, scorpionfish, crabs, shrimps, moray eels, seahorses, octopus, cuttlefish etc.. Thanks to Kevin MacLeod of http://www.incompetech.com for the music tracks, "Hidden Agenda" and "Sneaky Snitch". These tracks are licensed under a Creative Commons Attribution 3.0 Unported license. Thanks to the staff and keen-eyed divemasters of Two Fish Divers (http://www.twofishdivers.com), for accommodation, diving services and critter-spotting. The video was shot by Nick Hope with a Sony HVR-Z1P HDV camera in a Light & Motion Bluefin HD housing with Light & Motion Elite lights and a flat port. A Century +3.5 diopter was used for the most of the macro footage. I have more scuba diving videos and underwater footage on my website at: http://www.bubblevision.com I post updates about my videos here: http://www.facebook.com/bubblevision http://google.com/+bubblevision http://www.twitter.com/nicholashope http://bubblevision.tumblr.com Full list of marine life and dive sites featured in this video: 00:00 Juvenile Longhorn Cowfish (tentative), Lactoria cornuta, TK 1 00:20 Thornback Cowfish (juvenile), Lactoria fornasini, Aer Perang 00:33 Starry Puffer (juvenile), Arothron stellatus, Retak Larry 00:41 Starry Puffer, Arothron stellatus, TK 3 00:52 Map Puffer, Arothron mappa, Two Fish Divers house reef 01:15 Guineafowl Puffer (juvenile), Arothron meleagris, Tanjung Kusu-Kusu 01:32 Narrow-lined Puffer, Arothron manilensis, Hairball 01:45 Shortfin Puffer, Torquigener brevipinnis, TK 2 01:57 Valentini Puffer, Canthigaster valentini, Retak Larry 02:11 Bennett's Sharpnose Puffer, Canthigaster bennetti, Makawide 02:18 Compressed Toby, Canthigaster compressa, Two Fish Divers house reef 02:26 Birdbeak Burrfish, Cyclichthys orbicularis, Jahir 02:54 Long-spine Porcupinefish, Diodon holocanthus, TK 2 03:13 Birdbeak Burrfish, Cyclichthys orbicularis, TK 2 03:21 Birdbeak Burrfish, Cyclichthys orbicularis, TK 3 03:51

Teluk Kembahu 2
Indonesia
Sharks feeding, Osprey Reef,Coral Sea, Australia. Liveaboard Spoilsport April 2012, Mike Ball Expeditions, Cairns, Australia Other: Manta Ray http://goo.gl/SFL3B 02:39

North Horn
Australia

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    [ Informacja ] Wannadive è avaiable in italiano! Hi, Wannadive è avaiable in italiano! Today we are very happy to announce that Wannadive interface is available in Italian. We would like to thanks the following translators for their help and great Christmas gift! * Dave Noise (from Wannasurf) * Riccardo Ghetti (from Wannadive) * Lorenzo Facchin (from Wannadive) All Italian divers can now switch to Italian language by using the language selector at the top of Wannadive pages. Enjoy! We wish you a merry Christmas. WD Team
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