THESAURUS
ichthyologist
animal physiologist, anthropologist, biologist, conchologist, ecologist, entomologist, ethologist, helminthologist, herpetologist, malacologist, mammalogist, ophiologist, ornithologist, protozoologist, taxidermist, zoo-ecologist, zoographer, zoologist, zoonomist, zoopathologist, zoophysicist, zootaxonomist