I have a baby whale.... I have him temporarily in a 10g till he can go back into the 55g. Very shy fish. I only see him at feeding time and night since they are nocturnal. I didn't want to have to do the whole feeding at night too so he's gotten used to coming out in the light. Once he's done feeding he goes back and hides. I do have to say though I love this fish. It is hard to find information.