Something fishy is happening thousands of feet under the surface of the North Atlantic Ocean.

In a rare video, captured by the science-focused Rebikoff-Niggeler Foundation and first released as a Science Magazine exclusive, a female fanfin sea devil slowly pitches back and forth in the inky, cold waters 2,600 feet under the surface of the North Atlantic. If you look closely, you can see a tiny male hanging from her belly as a "sexual parasite." (Read: "Anglerfish, Taking Romantic Attachment to a Whole New Level")

Because of the intense underwater environment anglerfishes live in, the mysterious deep-sea dwellers have rarely been seen alive in their natural habitat. After wildlife photographers Kirsten and Joachim Jakobsen captured footage of this