This one has been quite hard to track down specifics on… Devil Summoner: Soul Hackers is a Japanese only console game that has appeared on the Sega Saturn and Sony Playstation. It’s a spin-off of the Megami Tensei series of RPG games, some of which were ported to the US. This is apparently the third most popular RPG series in Japan, after Final Fantasy and Dragon Quest. From what I’ve gathered it is a about a group of Hackers who find some sort of demon-summoning gun in a virtual city. It seems to have some sort of pokemon-style system of demon summons, which is where this fellow comes in:

This is “Tuna“. He is a demon from some sort of expansion set called “Devil Summoner: Soul Hackers Demon Compendium Vol. 2“. This is the best illustration I can find of him, haven’t been able to find an in-game screenshot of him so far.

I can’t find any other details on this guy, but who needs details? He’s a demon, his name is Tuna, he looks like a fish… All I can say is bad ass!

…….UPDATE!

I did manage to find an in-game shot of this guy in the battle set-up screen: