Sharks and Whale seem to freely move on land.

Also the spawn rates are still too high. :(

With the current settings I see some whales but I'm not seeing any sharks. What about you?

I will test when I get home from work.

I recall that in DRPG 1.4.7 it was pretty rare to see a whale and/or shark.

I know it wasn't common at least.

Whales are better, I have not seen any sharks either.

I will turn the sharks spawn rate way up and test it. If they still don't spawn we have a different problem.

Edit: Sharks don't seem to be spawning at all.

They were before, and I don't think that code got changed

If you change the size back to the way it used to be, sharks spawn again.

    this.setSize(0.95F, 0.95F);

You might have set it too small at the current setting.

    this.setSize(0.75F, 0.50F);

AIso, is this import used?

import net.minecraft.potion.Potion;

I liked the spawn rates for whales and sharks better at lowest setting you had before.

hmm... it appears that they might be spawning, but falling through water

This should be closed now right?

well the sharks still arent spawning

Oh I thought the size fixed it... :(
Also

i have not yet seen any crabs either. in 1.4.7 they were fairly common. Is there a specific biome that they should be spawning in other than ocean?

Beach. I've seen lots of them

Actually, now that mention it. I have not seen Crabs on the beach either. I have only seen King Crabs.

The Divine Crab Spawner that we found has been working fine.

When I first started our test world, I was surrounded by Crabs on the beach where I spawned. Some time shortly after that I have not seen them. I just roamed around a test world with night vision potion active so I could see to the bottom of the ocean.

I did not see any Sharks spawn in the Ocean or Crabs on the beaches.

I wish minecraft had better spawning control. :/