Why Did This Have to Happen During Shark Week? I understand that these things can happen, but why did it have to happen during Shark Week? It's a shame really. Well, where to start? So, I have a 60-gallon fish tank that I purchased during a Black Friday sale, upgrading my 15-gallon tank. When I purchased the tank, I set it up and let chill for a few days, before getting some new fish. I had a couple of fish that I transferred from my old tank. So, I loaded up the tank with a bunch of new fish, including Oscars, Cichlids, a tri-colored shark, and a red-tailed shark.