Here's what it looks like when the louse replaces a fish's tongue. While other parasites may seem like they could be doing something similar, they don’t quite cross the line into full organ ...

There is the Banggai cardinal fish, found only ... eating away its tongue, and staring out ominously with two black specks for eyes. Then there’s a parasitoid worm that Smith photographed ...

Several fishermen have stopped setting out to sea for their daily haul of fish in the past couple of days, after they found worms wriggling out of bodies of the fish they caught with their fibre nets.

A University of Washington researcher has found that infestations of two parasitic worms in fish have increased substantially in recent decades. The marine-parasite researcher, Chelsea Wood ...

This prehistoric-looking freshwater turtle is known for its spiked shell, strong, beaked jaws and worm-like tongue for luring fish. The alligator snapper faces a predicted 95% decline in 50 years and ...

In the case of this whale fall, which the researchers determined was a baleen whale, the ROVs' cameras saw octopuses, eelpout (eel-like, skinny fish), and bone-eating worms sharing in the feast.