Colassal Sunfish

 4,400-pound sunfish caught off North Africa literally tips the scales

The massive ocean sunfish weighed more than 4,400 pounds, scientists estimate. (Image credit: Reuters / Seville University)

Fishers recently hauled up a surprising catch off the coast of North Africa: a colossal ocean sunfish weighing an incredible 4,400 pounds (2,000 kilograms).

At least that's how heavy marine biologists estimated the mammoth fish to be, based on its girth and the dimensions of sunfish that had previously been captured and weighed. "We tried to put it on the 1,000-kilogram (2,200 pounds) scale, but it was too heavy," marine biologist Enrique Ostale told Reuters. "It would've broken it."

Fishers in Ceuta, a Spanish territory bordering Morocco, discovered the animal tangled in their nets in early October. They immediately called in Ostale, head of Seville University's Marine Biology Lab in Ceuta, to examine the massive sunfish. After first isolating the creature in an underwater pen attached to the boat, the team briefly hauled the fish into the air, using a crane.

Like other ocean sunfish, all of which belong to the genus Mola, the creature resembled an oblong pancake with huge, googly eyes stuck to its sides. Two massive, winglike fins extended from the top and bottom of the fish; in the ocean, sunfish wave these fins to and fro to propel their hefty bodies through the water.

Once the sunfish had been hoisted on deck, the team measured the animal and determined it to be 10.5 feet (3.2 meters) long and 9.5 feet (2.9 m) wide; for scale, a king-size bed is only 6.6 feet (2.03 m) long by 6.3 feet (1.9 m) wide. After measuring the sunfish and taking photos and DNA samples, the crew released the animal back into the sea, where it soon disappeared into the watery depths.  READ MORE...

Cannibal TOADS

The cane toad (Rhinella marina) is an invasive species in Australia, where its tadpoles have become voracious cannibals. (Image credit: Jason Edwards via Getty Images)

The hatchlings of the invasive cane toad in Australia don't stand a chance against their deadliest predator: cannibal tadpoles who guzzle the hatchlings like they're at an all-you-can-eat buffet. But now, the hatchlings are fighting back.

They're developing faster, reducing the time that hungry tadpoles have to gobble them up, a new study finds.

"If cannibals are looking for you, the less time you can spend as an egg or hatchling, the better," said study lead researcher Jayna DeVore, who did the research as a postdoctoral research associate at the University of Sydney and is now a biologist for the Tetiaroa Society, a nonprofit conservation organization in French Polynesia.

Developing quickly, however, has its pitfalls. Compared with typically growing hatchlings, those that grew faster fared worse when they reached the tadpole stage of life, the researchers found. 

So it isn't "worth it to try to defend yourself in this way unless cannibals are definitely coming for you," DeVore told Live Science. READ MORE

Tortoise Going in For The Kill

In what amounts to perhaps the most unhurried act of animal predation ever caught on camera, researchers have filmed for the first time a giant tortoise slowly – ever so slowly – closing in for the kill.

This drawn-out encounter – between a lumbering, almost leisurely giant tortoise (Aldabrachelys gigantea) and its grounded bird prey – is gruesome to watch. But it's also entirely transfixing.

After all, we've never seen a tortoise 'hunt' anything before. Who knew these dawdling giants had it in them?

"I couldn't believe what I was seeing," says biologist Justin Gerlach from the University of

Cambridge.  "It was horrifying and amazing at the same time."

  

The footage, captured on Frégate Island in the Seychelles archipelago, shows a female giant tortoise slowly pursuing a flightless lesser noddy tern (Anous tenuirostris) chick.

In a new study describing the encounter – said to be the "first documented observation of a tortoise deliberately attacking and consuming another animal" – the researchers indicate the hunt lasted seven minutes in total, including a passage where the tortoise pursued the chick along the top of a log.

The video – captured by Anna Zora, deputy conservation and sustainability manager with the Frégate Island Foundation – lasts for only a fraction of that, but it's enough to unequivocally show a deliberate, calculated attack on the part of the tortoise.  READ MORE