Redman that is a white spotted bamboo shark, Chiloscyllium Plagiosum, cool shark but I am looking for the marble coral cat shark, Atelomycterus Marmoratus.
As for tank size of the white spotted, min of 160 according to Scott W. Michael (Aquarium Sharks & Rays), definately no lion, they can sting the shark, a moray should be a suitable tank mate, you just have to watch the shark, most of the bamboo sharks are pretty chill, but I have read the smaller coral catsharks have occationally nipped eels, and gone after other tank mates