This is my grandmas red tail shark. I’m a bit worried about it. She has had it for like 2 or 3 years, and it’s in a 10 gallon tank. The pictures aren’t great but it’s fins are all really small, in back fin is also small but the bottom portion is smaller than the upper part. Also it has no dorsal fin except a small protrusion on the top. What can I do to help it? I know that it needs at least a 50 gallon, and a 10 is way to small. I’m not able to take it because it can’t go in any of my tanks. What should I do?