HOW SHARKS SMELL BLOOD IS FAR MORE INTERESTING than their mythical ability to detect the scent of “a drop of blood miles away.” Scientists disproved that legend long ago, although you may still find it in cheesy movies and on shark-week type reality shows. Sharks do have an amazing sense of smell, but their long-range detection capabilities are limited to several hundred yards rather than miles, many authoritative sources suggest. And one study suggests that
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HERE’S A REMARKABLE PHOTO OF A SHARK PUP HATCHING, published in the terrific science magazine bioGraphic. It’s a small spotted catshark (Scyliorhinus canicula), caught just after its emergence from its egg casing. That’s its name – small spotted catshark – but the little shark has other common names, including lesser spotted dogfish. Recreational diver are not so likely to see one. S. canicula is a bottom-dweller at depths from 30 to 300 feet/10 to 300
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A NEWLY IDENTIFIED SPECIES OF SHARK has been named “Genie’s Dogfish” in honor of renowned marine biologist Eugenie Clark, a.k.a. the “Shark Lady.” It may be just coincidence that the news about “Genie’s Dogfish” came out just when the cable networks have resumed telling us that it’s totally unsafe to be in any ocean with any shark. But it’s fitting. Dr. Clark, who died in 2015 at age 92, was a pioneer in shark research
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HAPPY SHARK AWARENESS DAY! I’m not sure who decreed it so but every July 14th is Shark Awareness Day. It’s a time to appreciate our cartilaginous fellow travelers on Planet Earth with a generous supply of actual shark facts. To judge by what we see on cable television, sharks are cold-blooded psychopaths always in a brutal frenzy of hunting man and beast, ready to grab a tasty arm or foot at the first opportunity. LESS
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WHERE’S WALDO? That might be the question this yellow stingray (Urobatis jamaicensis) hopes we’re asking, as it fluffs up sand to try to hide itself. In this case it didn’t work since we watched it approach and then proceed to bury itself – most ineffectively. YELLOW STINGRAY FACTS U. jamaicensis typically measures 12 to 15 inches across, excluding the tail (although the Pittsburgh Zoo & Aquarium, which has yellow stingrays in its collection, says they
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SCIENTISTS STUDYING A SPECIES OF RAYS CALLED LITTLE SKATES have demonstrated that walking capabilities had developed in fishes dwelling on the seabottom millions of years before the first marine animals climbed out of the oceans to become air-breathing, leg-walking land dwellers. And they show how they moved with a video of modern little skates – little skate is the fish’s common name, not just a description – do it, utilizing a set of fins to
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SHARKS’ REPUTATION AS FIERCE, MAN-EATING APEX PREDATORS of the oceans takes a hit when you consider the bonnethead shark (Sphyrna tiburo), a small variety of hammerhead found mostly in warm waters along the Atlantic and Gulf coastlines of North and South America. Along with their normal carnivorous diet, bonnetheads eat grass, as in seagrass. How much grass? It accounts for as much as 62 percent of its gut content in some juvenile populations. The bonnetheads’
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THE EXTREME COLD GRIPPING MUCH OF THE NATION at present is likely a factor in the deaths of three thresher sharks, whose bodies have washed ashore on Cape Cod in recent days. As northern waters cooled, the sharks were probably migrating south along the coast, got trapped in Cape Cod Bay and ended up at the shore near bay-side towns Wellfleet and Orleans, according to a news article about the freezing weather nationwide in the
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A BILL BANNING THE SHARK FIN TRADE IN THE UNITED STATES appears likely to be passed by Congress, based on a hearing earlier this month by a House subcommittee. BIPARTISAN SUPPORT With 200 co-sponsors, HR1456, the “Shark Fin Trade Elimination Act,” has strong bipartisan support in the House and a similar bill under consideration in the Senate has 19 co-sponsors. The hearing by a subgroup of the House Committee on Oversight and Government Reform was described
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Atlantic torpedo rays aren’t your usual, charismatic touristy rays, like mantas, spotted eagles or even southern stingrays. In a way, they’re more interesting. It’s not for nothing that members of the family Torpedinidae are called electric rays. The Atlantic torpedo (Torpedo nobiliana) is one of 14 species of Torpedinidae rays worldwide that can deliver an electric shock – most producing less than 80 volts. T. nobiliana delivers up to 220-volts – probably not enough to kill
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