Cymothoa exigua, or the tongue-eating louse.The parasite severs the blood vessels in the fish's tongue, causing the tongue to fall off. It then attaches itself to the stub of what was once its tongue and becomes the fish's new tongue.
OK, I gotta tell you a story. It’s a story that people have forgotten. Long before there were dewormers, horses and internal parasites (worms) got along pretty well. Horses had worms—worms had horses. The horses didn’t benefit from the parasites, but, mostly, they didn’t seem to mind. Parasites are part of the normal population of Continued
The above image is an example of commensalism because the remora has a sucker and it attaches its self to the shark and eats the scraps and leftovers from the sharks meal. Meanwhile, the shark doesn't care.
Glow-in-the-Dark Cockroach Among Top 10 New Species
Photograph of a new, light-mimicking cockroach iLucihormetica luckae/i in daylight and under fluorescent light. Notable are two luminescent lanterns and one minor asymmetrical lantern on the right side. The species is likely extinct %u2014 its only known habitat was destroyed by the eruption of Tungurahua in December 2010.