'Supergiant' amphipod discovered in deep sea near New Zealand

Scientists on an expedition to sample a deep-sea trench got a surprise when their traps brought back seven giant crustaceans glimpsed only a handful of times in human history.

The "supergiant" amphipods are more than 20 times larger than their typical crustacean relatives, which are generally less than a half-inch long, and thrive in lakes and oceans around the world. They are sometimes called the "insects of the sea."

The largest of the seven specimens was about 11 inches long.

The pale, leggy creatures were found 4 miles down in the Kermadec Trench, off the northeast coast of New Zealand, one of the deepest trenches on Earth.

In addition to the animals captured in the trap, a seafloor camera more than a mile away spied at least nine supergiant amphipods. It's not clear why so many of the typically elusive creatures were in the area. A week later, when the expedition returned to the same spot, there was no sign of the supergiant amphipods.

Supergiant amphipods (Alicella gigantea) were first discovered in 1899, when a trawling expedition turned up two specimens from the Atlantic Ocean. The species wasn't seen again for nearly 100 years. In the 1970s, scientists photographed the oversized creatures in the northern Pacific Ocean, hundreds of miles north of Hawaii.

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