It's about 2.5x the thickness of a leleupi, and his mouth structure is very different. There are very defined jowells, almost like a goby. He also spends time sitting on his front fins which are dark purple. He's got that orange by his gills like a Daphodile brichardi.
I've never seen a Tetracanthis this big, but that's the closest body shape. He's got a bit more of a long flat body almost like an algae blenny.
He's gotten a bit bigger, but here is a video. All these fish have been together for almost 3 years. They're in a 46bf but are about to be upped to a 110xhigh. The Tetracanthis is too mean for the tank, and I'd love to pair it up for a breeding project.
http://www.youtube.com/watch?v=0bBl__D9tF0&sns=em