Video shows deep-sea fish with blood-sucking parasite 'pigtails'
A Schmidt Ocean Institute's video showed two blood-sucking parasites latched onto the head of a deep-sea rattail fish. The copepods, with long egg sacs attached to their back, can be seen on either side of the fish's head, making it look like the latter is sporting pigtails. "They feed on blood and fluids from their host," a scientist said.