Anon, please provide a link to your map with the "aquarium" tags. Couldn't find those. Looked at OR aquarium Bacliff on google maps and don't see a flag or any evidence of a school. It did look "fishy" (hehe) however, so definitely interesting find…
https://www.google.com/maps/@29.507983,-94.9886202,3a,75y,249.68h,75.55t/data=!3m6!1e1!3m4!1svWHCAF6WQDu2WzzKkGlViA!2e0!7i16384!8i8192