There's nothing wrong with this upside down anglerfish. That's just how they swim

"More than two decades ago, researchers captured the first confirmed footage of a deepsea anglerfish. But something about it seemed off. Or, more specifically, upside down.

The female whipnose anglerfish was bobbing around belly-up just above the ocean's floor. 

"What wasn't known was: Is this abnormal behaviour?" Andrew Stewart, curator of fishes at the Museum of New Zealand, told As It Happens host Nil Köksal."

Read the full article CBC.