<a href=showthread.php?s=&postid=12540961#post12540961 target=_blank>Originally posted</a> by philter4
3 inch is fine, more is better but he will build a burrow. Just add some coral rubble for him to build In the ocean what they do is find a flat piece of rock and burrow under it as the roof of their home. if you give him a lg flat rock or shell, bury it about 2 inch under the sand and cover it, then scatter the rubble around. He will use the rock as a roof and make his tunnel out of the rubble and sand that he moves around. It may take him a few burrows to find the flat rock, but he will.
As for food, they will find the food. They feed on plankton floating past them so as long as there is currrent to move the food, they will have no trouble. Start out with frozen foods until he is eating well then start to introduce flake and pellets. I have about 20 jaws in 7 species that I have collected myself and they all switch over to pellets and flake quickly.
One more bit of advice, jawfish jump especially when they are new so cover every bit of the tank to keep it in. I have had jawfish jump even after they were established, in the early 90's I collected 6 bluespotted jaw in the Sea of Cortez and after 2 years the only 2 that had died both jumped.
One of my favorite jawfish is the swallow tail it is native to here in FL but lives deep, Ive never seen one in less then 90 ft and the trio I have came from around 120 ft. The male has a huge sail like dorsal fin that he waves like a flag when he is displaying. I've never seen them for sale, but they are colored like a pacific black head jaw, with blue bands on a pastel yellow body and a black head. Very beautiful.
Good luck, and you may find that the jawfish becomes one of your favorite fish as well as your wifes.