Are you going to qt. Many times fish like this, that you rarely find info on, is due to them not surviving long. They eat small fish, shrimp and crabs and such in the wild. I would imagine with a dt that large you have other inhabitants. I would not count on him taking dead food. I would set him up in at least a 40 breeder as an observation tank, start him off on live mollies, fiddler crabs, and ghost shrimp. The more common walking batfish does not take dead food well and the only long term success is by feeding live food.