A realistic fish called the speckled peacock bass. This is an Amazon fish and is quite an exotic fish to fish for from what I heard. If you have a game or movie or advertisement then this guy here would be perfect for you.
This fish was made in 3ds max 2010 and rendered with mental ray. A daylight system was used as long with a MR omni light as well.
The geometry are the following.
No Turbosmooth Polygons: 3,334 Vertices's: 3,337
With Turbosmooth Polygons: 97,236 Vertices's: 48,866