We set out trash on Sunday evening for Monday morning pick up, so if we go fishing on Saturday or Sunday, I just bag it and put it in the trash. However, if it's earlier in the week or the weather is very hot, I will freeze the remains first so they don't: 1) knock over our trash collector or 2) attract critters.
Small fish I turn into the garden, but larger ones and especially catfish, attract coons and coyotes, so they go into the trash. - Roberta