The animation itself isn't bad, but could be better, the tail and top of the body move a little unnaturally and the flickering at the bottom of the sands is a little distracting. The white lines are also a little weird with how tucked in they are. I know clownfish tend to look like that but not quite that tight. You could try making it more slopes so it doesn't look like it's being gripped by something  Keep up the good work, tho! You have a good start here~