I would say Clyde and Seamore definitely. You might need it for the Shamu Adventure. Crique de ler Mer has virtually no dialogue, except for a few introductory statements.
If you need a sign language interpreter, here's some information:
Thank you for contacting SeaWorld Adventure Park Orlando. SeaWorld is happy to
provide sign language interpreters for our hearing impaired guests. There is no
charge for this service and we request that you provide one to two weeks advance
notice in order to schedule your interpreter. During high attendance periods we
ask that you provide as much notice as possible and will request an alternate
visitation date if an interpreter is unavailable for your original date. Please
call our Guest Services office at (407) 363-2414 in order to schedule your sign
language interpreter.
Thank you again for contacting SeaWorld Orlando.
SeaWorld Adventure Park Orlando