fish,camille,saint,saens,classical,symphony,orchestra,like,violins n shit Saint-Saëns - Carnival of the Animals: The Aquarium

if there's any of the composer's work that you might be familiar with, it's either the Organ Symphony (re-orchestrated as the theme to "Babe") or this bit, which is often used in movies, at moments of fantasy and wonder.

ps. the YouTube submitter tossed in an awesome and detailed Description field, if you're interested.