Redeye Puffer Carinotetraodon

there's a few different ones, lorteti, irrubesco and salivator. Salivator are not available in the hobby, of the other 2, irrubescu is the most peaceful and can live with other fish quite happily. Lorteti is much more aggressive.
They both grow to 2-3 inches and are rather cryptic compared to most puffers.
Hope that helps

They use it quite a lot in the baensch series of books to describe certain fish which are secretive and slightly shy. Keep themselves to themselves.

I have a pair of these fish in a tank with another puffer, some halfbeaks and some other fish, and they are quite shy. Active in the morning, feed happily on bloodworm and I would compare the aggression to that of breeding cichlids. They never really damage the fish I have however.

I keep C. irrubesco by the way.

The only problem I find with them is that they seem to be very prone to bacterial infection which I always treat with a saltwater dip.

Hope that helps