I would like a few more minecraft ocean mobs as the ocean is so empty and the only mob that survives there is a squid!

Mob ideas:
Seahorse (could have a twist to it enabling you to ride it)
Tuna (could be a new food)
Angler (light up the sea? maybe even to make a torch that is usable underwater)
Swordfish (hostile mob that can attack you if you're not in a boat, this would give a better reason for using a boat)
Small schools of fish (just a useless mob/s like bats but just give that extra feel to minecraft)
Jellyfish (sting you or poison you if not on a boat)
Sea temple with boss? ideas, Neptune, lockness monster, killer whale?

The main reason I would like more ocean mobs is because the ocean is so empty and boring, many of us do not enjoy swimming/riding a boat across the ocean because of this. The ocean needs that extra feel to it, an adventurous mysterious feel.

Thank you for reading and I hope you like my ideas! :D