Swimming is fun for fish

SWIMMING IS FUN FOR FISH

Swimming is so fun for fish,fun for fish, fun for fish!Swimming is so fun for fish and we do it all day long!
Oops!What's this?Seaweed!Which way should I go to swim through the seaweed?
----Sorry,try again!
through----Yes,you're right!
under----Sorry,try again!

(Swimming is so fun for fish and we do it all day long!)
Oops!What's this?A reef!Which way should I go to swim over the reef?
over----Yes,you're right!
through----Sorry,try again!
under----Sorry,try again!

(Swimming is so fun for fish and we do it all day long!)
Oops!What's this?A whale!Which way should I go to swim under the whale?
over----Sorry,try again!
through----Sorry,try again!
under----Yes,you're right!

(Swimming is so fun for fish and we do it all day long!)
Oops!What's this?A cave!Which way should I go to swim inside the cave?
over----Sorry,try again!
inside----Yes,you're right!
under----Sorry,try again!

(Shark Tank)
Thank you for helping me