Fishtank - F2U Character code

FINALLY managed to finish it in time...

This code was made for CODING QUARTERS - Februay Challenge using the Flip theme!

if this theme has any issues, please tell me and I'll try to fix em'

Do not use WYSIWYG! Use the code editor for this code!

THE HTML+CSS VERSION ONLY WORKS FOR PREMIUM USERS!
The html-only version works for non-premium users. The fish do NOT move in this one.