I have owned a Hornet for a while and have been limited to the S/L and the A/V hangars until this afternoon when I purchased a cutlass and loaded all my ships into the asteroid hangar. When there, I noticed I have a fish tank in it (coral, water but no fish), but there is no fish tank in any other hangar and I did not get one from the stretch goals or buying one.

Is this a bug? Or can I buy a fish for it?