ADAM HANLON PHOTOGRAPHY

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  • A Caribbean reef shark (Carcharhinus perezi) patrols through the sunbeams at Tiger Beach, Grand Bahama. <br />
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Caribbean reef sharks are a species of requiem shark, belonging to the family Carcharhinidae and are found in the tropical waters of the western Atlantic Ocean from Florida to Brazil. They are the most commonly encountered reef shark in the Caribbean Sea.
    Reef shark patrol
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  • Geometric Chromodoris (Chromodoris geometries) moving across its substrate of a piece of fallen timber. In common with many nudibranchs, this Chromodoris feeds on hydroids, coral, sponges and anemones. As it moves, its mantle "waves" up and down.
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  • Risbecia tryoni nudibranchs apparently nuzzle priot to mating. It is likely that they are actually using the chemical receptors on their rhinophores to sense the readiness of the other.
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  • Two Phyllidia marindica nudibranchs prepare to mate. These animals are widespread throughout the Indian and Pacific Oceans.
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  • A bus stop nudibranch (Goniobranchus hintuanensis) lifts its mantle or skirt as it negotiates the sea floor. These species were re classified with the help of DNA analyisis in 2012. Nudibrachs move with the help of a muscular foot, that has rythmic contractions along its length.
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  • Perfectly designed to seek and hunt its benthic prey, this great hammerhead's (Sphyrna mokarran) cephlafoil (or hammer) is packed full of amazing sensors. It's downward facing mounth allows it to strike as soon as the sensors find prey. Perhaps less obviously, hammerhaeds are amazingly maneouverable, allowing them to react in an instant to prey as they find it.
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  • Close up stady of the rhinophores of a Marie's Mexichromis nudibranch. (Mexichromis mariei). These sensory organs provide a great deal of information about chemical and scents in the water as well as currents and water movements. Taken in the Lembeh Straits, Sulawesi, Indonesia.
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  • The red on this Nembrotha kubaryana signal danger to any passing animla that thinks that it might be a good meal!
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  • This Marie's Mexichromis (Mexichromis mariei) is laying a trail or ribbon of eggs. Each species of nudibranch has a distinct pattern when it lays eggs and this allows biologists to identify which eggs belong to which animal.
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  • The colors of this Flabellina rubrolineata warn other animals that it may give them a anasty surpise if they try to eat it. It can store the poison from the stinging cells of the animals it eats, and use it as aweapon in its defence.
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  • There are still many species of nudibranch that are as yet undescribed by science. This animla rejoices in the name Nembrotha species 2 and is not yet properly taxonomically classified. The use of genetic sequencing has also created many new controversies, with many existing families and species being reclassified. This partcular specimen has tangled with something that has removed one rhinophore.
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  • A lionfish (Pterois volitans) shows of its impressive mouthparts to warn off the photographer. These fish are voracious predators and are equipped with poisonous spines to deter the unwary. This image was taken in the Red Sea, where they are endemic. Relatively recently however, they have found their way to the Caribbean where they are decimating local fish species that are unprepared to deal with such an efficient predator.
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  • A tiger shark (Galeocerdo cuvier), peers inquisitively into my dome port during the Wetpixel Tiger Sharks Expedition with Epic Diving. This amazing creature is equipped with an array of sensors in his nose, which can be seen in the image as the structures that look like pores. Included amongst these are the Ampullae of Lorenzini, which are electrical receptors, probably capable of picking up the electrical nerve impulses which make my heart beat.
    Nosy Tiger
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  • A clown frogfish  (Antennarius maculatus) makes its ponderous way across the sea bed. Frogfish move using their modified pectoral and pelvic fins to walk along the floor as this one is, not unlike a biped's walking gait  or they can make short "hops"  In the case of the latter, they move their pectoral fins simultaneously forward and back, transferring their weight to the pelvic fins while moving the pectorals forward.
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  • A striated or "hairy" frogfish (Antennarius striatus) waves its esca or lure in an attempt to attract prey. Some think that the fish's "hairs", which are actually dermal spinules,  are designed to make them look like urchins. My experience is that they are not always found among urchins, so the "hairs" are simply a good way of breaking up the fish's outline for camouflage.
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  • Close up of a nudibranch's rhinophore. These animals use these organs to detect chemicals in the water to effcetively find food and potential mates. They also sense water movements, giving the nudibranch information about its environment.
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  • A Nembrotha purpureolineata feeds as it moves across the seabed. In common with many sea slugs, they are specialised eaters, only feeding on tunicates or sea squirts.
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  • A redline flabellina (Flabellina rubrolineata) strikes a pose. Taken in the Lembeh Straits, Sulawesi, Indonesia.
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  • Nudibranch means "naked gills". These animals have external organs that allow them to extratct oxygen from the water. This close up shows the brachial plume, or its lungs.
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  • This Marie's Mexichromis (Mexichromis mariei) is laying a trail or ribbon of eggs. Each species of nudibranch has a distinct pattern when it lays eggs and this allows biologists to identify which eggs belong to which animal.
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  • It is obvious how the construction of this crested nembrotha"s (Nembrotha cristata) rhinophores have been designed in order to maximise their surface area. Like the cooling fins on a motornike engine, this increased surface area allows them to sample more water around them and hence obtian a better picture of their environment.
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  • A Nembrotha kubaryana nudibranch makes its way across an encrusting sponge. Taken in the Lembeh Straits, Sulawesi, Indonesia.
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  • Nudibranchs will often climb up bits of coral in order to use their extraordinary chemo receptor rhinophores to "taste" the water and sense food sources and threats.
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