Angelshark
Listed as critically endangered by the International Union for Conservation of Nature, the angelshark (Squatina squatina), or monkfish, is no longer found in many northeastern Atlantic and Mediterranean spots where it was once common. An angelshark usually lies buried in sediment, with only its eyes showing. Mother Nature knew what she was doing — this well-camouflaged shark waits patiently to surprise its favorite prey, bottom-dwelling skates and invertebrates. Generally not aggressive, angelsharks can deliver a bite if they feel harassed or threatened.
Spotted Wobbegong Shark
Like the angelshark, this sluggish carpet shark (Orectolobus maculatus) depends on camouflage for its nocturnal sneak attacks on prey. While it resembles the 11 other wobbegong species in its family, the spotted’s pattern of coloration — a golden-sand to light-green color that’s marked by a dark saddle across its body and irregularly shaped white rings — is distinct. Native to the western Pacific, the wobbegong’s name comes from the Australian Aboriginal word for “shaggy beard.”
Goblin Shark
Look up the term “living fossil,” and you’ll conclude the deepwater goblin shark (Mitsukurina owstoni) is a good example. It can trace its lineage back 125 million years and inhabits water in depths — 330 feet and deeper — to which recreational scuba divers don’t venture. With its sword-blade snout and dozens of rows of higgledy-piggledy, nail-like teeth, this shark has a face only its mother could love.
Frill Shark
You’d be forgiven if the monster under your childhood bed resembled the eellike frilled shark (Chlamydoselachus anguineus). Its fearsome looks are the stuff of nightmares: Its mouth is crammed with 25 rows of backward-facing trident-shaped teeth — 300 in all — that are perfect for snagging terrified children. Of course, the frilled shark doesn’t eat children; in fact, human sightings are as rare as spotting a white peacock, baby bongo or blue flamingo. We don’t know much about this shark; that’s because it carries on its mysterious life in inky-black waters as deep as 1,500 feet.
Megamouth Shark
Whale sharks and basking sharks get all the press, but this filter feeder is in a class all its own — literally. It’s the sole species in the distinct family Megachasmidae. The megamouth (Megachasma pelagios) wasn’t even discovered until 1976, when a U.S. Navy research vessel hauled up an adult male off the coast of Oahu, Hawaii, making it one of the more sensational discoveries in 20th-century ichthyology. There have been fewer than 100 sightings, but they do come to the ocean’s surface to suck up krill, so while rare, it’s not impossible to encounter one.
Horn Shark
Every once in a while, you might spot a horn shark (Heterodontus francisci) with a purple grill, a result of eating too many sea urchins, one of its favorite meals. This spotted shark’s name derives from the ridges behind its eyes; each dorsal fin has a spike. When they move, it looks like they’re flapping their fins like a bird, but they’re slow, bottom-dwelling swimmers, often resting on the sand or in aquatic plants. Found along the North American west coast, horn sharks are known to be homebodies that don’t travel more than 10 miles. They are perhaps best known for their beautiful, spiral-shaped egg cases, which females wedge between rocks in the springtime.
Source: sport diver
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