paleoillustration:

Helicoprion and Stethacanthus by Julio Lacerda

theoceaniswonderful: Even Rap Stars Don’t Roll Like This by Ryan Chanatry

theoceaniswonderful:

Even Rap Stars Don’t Roll Like This by Ryan Chanatry

thesharkives: bull

thesharkives:

bull

bigsharks: This is Denny, a little tiger shark from Tiger Beach in the Bahamas. Poor Denny had his dorsal fin crushed by a bite from another shark, and received several puncture wounds. He’d also recently been hooked by a fisherman :( The good news is, sharks are pretty tough, and little Denny survived these unfortunate events. Hopefully he’ll be around for a very long time! Photograph by Greg Mooney. Source of information here

bigsharks:

This is Denny, a little tiger shark from Tiger Beach in the Bahamas. Poor Denny had his dorsal fin crushed by a bite from another shark, and received several puncture wounds. He’d also recently been hooked by a fisherman :( The good news is, sharks are pretty tough, and little Denny survived these unfortunate events. Hopefully he’ll be around for a very long time!

Photograph by Greg Mooney.

Source of information here

rhamphotheca: Sharks Eating Songbirds in the Gulf of Mexico by Rachel Kaufman What’s a songbird doing in the belly of a tiger shark? The predators are eating land birds affected by offshore oil rigs in the Gulf of Mexico (map), according to new research. Marcus Drymon, of Dauphin Island Sea Lab, has been studying fish off the Alabama coast since 2006. During a routine sampling in 2009, he pulled a tiger shark onto the deck of his boat to tag and release it. “He coughed up some feathers,” Drymon said. That in itself wasn’t unusual, he said. Tiger sharks in other parts of the world are known to eat marine birds. But once Drymon analyzed the feathers in the lab, he was fairly sure they had come from a terrestrial bird. So Drymon and his team launched a project to study the sharks’ diets. Over two years the team caught 50 tiger sharks—mostly within 5 to 10 miles (8 to 16 kilometers) offshore—and dissected their stomachs. In about half of the sharks, Drymon found “feathers, or beaks, or bird feet, or some kind of bird part.” All the parts were later found to originate from land birds such as woodpeckers, tanagers, and meadowlarks… (read more: National Geo)     (image: Brian Skerry) Oh tiger sharks, you so crazy

rhamphotheca:

Sharks Eating Songbirds in the Gulf of Mexico

by Rachel Kaufman

What’s a songbird doing in the belly of a tiger shark?

The predators are eating land birds affected by offshore oil rigs in the Gulf of Mexico (map), according to new research. Marcus Drymon, of Dauphin Island Sea Lab, has been studying fish off the Alabama coast since 2006. During a routine sampling in 2009, he pulled a tiger shark onto the deck of his boat to tag and release it.

“He coughed up some feathers,” Drymon said.

That in itself wasn’t unusual, he said. Tiger sharks in other parts of the world are known to eat marine birds. But once Drymon analyzed the feathers in the lab, he was fairly sure they had come from a terrestrial bird. So Drymon and his team launched a project to study the sharks’ diets. Over two years the team caught 50 tiger sharks—mostly within 5 to 10 miles (8 to 16 kilometers) offshore—and dissected their stomachs.

In about half of the sharks, Drymon found “feathers, or beaks, or bird feet, or some kind of bird part.” All the parts were later found to originate from land birds such as woodpeckers, tanagers, and meadowlarks…

(read more: National Geo)     (image: Brian Skerry)

Oh tiger sharks, you so crazy

cute shark is cute

cute shark is cute

(Source: sharks-ahoy)

thedailywhat: I, For One, Etc. of the Day: Scientists in Australia say they’ve discovered the world’s first hybrid shark — a cross being the genetically distinct common black-tip and Australian black-tip — swimming along the coastline between New South Wales and Queensland. “Telling the hybrids is extremely difficult, which is why it has never been done before,” Dr. Colin Simfendorfer of James Cook University told ABC Radio. “It came very much out of leftfield. We didn’t think it was a possibility, but lo and behold there it was.” 57 hybrids were found in five separate locations. Unlike other hybrids in the animal world, these new sharks appear to be mating with other members of their species. Scientists speculate that the cause of interbreeding could be environmental change: The two black-tip species that make up the hybrid favor different water temperatures. As to whether there is any chance of the hybrids turning into a “Jaws-style mega-shark,” the scientists say there is no risk of that at this time. No word on lasers, though. [telegraph.]

thedailywhat:

I, For One, Etc. of the Day: Scientists in Australia say they’ve discovered the world’s first hybrid shark — a cross being the genetically distinct common black-tip and Australian black-tip — swimming along the coastline between New South Wales and Queensland.

“Telling the hybrids is extremely difficult, which is why it has never been done before,” Dr. Colin Simfendorfer of James Cook University told ABC Radio. “It came very much out of leftfield. We didn’t think it was a possibility, but lo and behold there it was.”

57 hybrids were found in five separate locations.

Unlike other hybrids in the animal world, these new sharks appear to be mating with other members of their species. Scientists speculate that the cause of interbreeding could be environmental change: The two black-tip species that make up the hybrid favor different water temperatures.

As to whether there is any chance of the hybrids turning into a “Jaws-style mega-shark,” the scientists say there is no risk of that at this time.

No word on lasers, though.

[telegraph.]

tagged as Sharks. Elasmobranchii.

via shaaarks

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