Blinky discovered, but it's a crab, not a fish
This three-eyed crab was discovered by Gerhard Scholtz of the Humboldt University of Berlin in Germany. Unlike it's cartoon counterpart that was created by exposure to nuclear waste, this Blinky is most likely a pair of conjoined twins with the second crab being nothing more than a head.
This particular crab, Amarinus lacustris, was found in 2007 in the Hoteo river on New Zealand's North Island. In addition to the three eyes, the crab also had an interesting antenna-like structure sticking out of its back. The set of structures is completely unique and has never been found any place else.
Scholtz is unsure how this deformity happend to this particular crab and as mentioned, he thinks the deformity might actually be two conjoined twins.
He reported his find in the journal Arthropod Structure & Development.