Two things are a very VERY BAD idea here. First you should never EVER feed your frog while it is on moss unless you are tong feeding, BUT even that is not safe with how much moss you have in with your frog. If the frog accidentally ingests the moss it may become impacted and die. Moss poses a serious impaction risk for frogs especially Voracious eaters like Pacman Frogs.

Second gold fish are bad feeder fish and carry disease as well as being heavily fattening. The substance that makes them gold is actually bad also. Mollys, Guppies, and Minnows are best.

Your frog looks healthy nonetheless, but be careful.