fish

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Note to self: Don’t go swimming in Brazil.

Joao Antonio Cruz Junior recently uploaded a video to YouTube of him feeding some piranhas in a river.

It looks pretty calm until he tosses in a hunk of meat, and then all hell breaks loose.

Watch as these water demons tear their food to shreds, and then never go anywhere near this place ever because they will ruthlessly kill you and gnaw on your bones.

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A copper rockfish at the Vancouver Aquarium developed cataracts in his eye and had to have it removed. The sad little one-eyed guy then retreated to the bottom of the tank and was constantly picked on by his tankmates.

To help save him from the abuse, head veterinarian Dr. Martin Haulena recently performed surgery to give him a prosthetic replacement.

"Without an eye, the other fishes would act aggressively towards it for appearing sick and weak," the aquarium wrote on its blog.

They put the fish under anesthesia before the procedure, seen above.

After the surgery he seemed to fit right back in with the others.

"Ever since we put in the prosthetic the fish is right back in the mid-water column, interacting with other fish," Haulena told Global News. "He's more robust. Everybody, including the fish, seem a lot happier now."

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Via Discovery
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A clever fish has figured out that if it produces sounds in an oyster shell, the noises will carry over long distances, according to new research. The study, published in The Journal of Experimental Biology, is just the latest to show that fish are far from being silent. Many can produce sounds by vibrating their swimbladders and, like a fishy form of Morse Code, they can create different meanings based on the sounds.
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Via National Geographic:

With its gaping mouth, needle-sharp teeth, and slightly startled expression, the black sea devil anglerfish seems tailor-made for the spotlight.

And in fact, one particular female got her close-up on November 17 when researchers got footage of this rare anglerfish—the first time this species has been filmed alive and in its natural habitat—off of central California