I have! In Brazil we have a project called Tamar which is a sea animal shelter + zoo with loads of teaching guides.

I’ve gone with my dad several times when I was a kid. One time we touched a stingray (very slimy) and a Nurse shark. Here they are called Sleepy shark / Sandpaper shark because their skin is very course and they sleep a lot. We also got to watch some turtles crack their eggs and get to sea, it was lovely (and kinda boring, they are slow).