I think that we, as a society, are in bad shape when dollar value means more than the idea that a creature has life itself. If we teach children that life is anything other than precious, no matter what living thing is being referred to, that thought will carry over to other animals and to people too. Is this what we really want?
Many a fishkeeper has started out with a free fish and by treasuring it and making it a beloved pet, has learned to keep a good, healthy tank. This can the beginning of a lifelong hobby and the development of interest in many aspects of science. Any parent who denies this opportunity to a youngster, IMHO, is a fool!