Jellyfish king

[Mariofan09]

Ok so i recently got to the jellyfish king boss fight and i keep getting killed even after i use all my food he kills me is there any way to keep his friends under control?

[Hiro]

Hmm. He is a pretty tough boss to beat unless you keep his little friends under control, yes. I find it's usually easiest to eat large groups of them in beast form to clear some space for hitting the king himself. Just let them build up a bit then focus on culling them until you think you have enough breathing room to get around. It might be helpful to eat some spider roll too so they get slowed down.
Hope that helps.

[Inyssius]

I eventually got through using this general strategy:

In Energy Form, focus on rate of fire. Spraying the core with a hundred shots and missing with eighty of them is better than connecting with every one of a carefully-aimed fifteen, especially when the shell around it is moving. When it starts up the lasers, focus on staying inside them and just keep firing, no matter where the shell's opening is; a few are bound to connect, no matter how bad you might be at shooting around corners.

When his homies start to seriously harsh your vibe, switch to Beast Form (via the hotkeys), get them all bunched up in one place, and dive in and out of it with your mouth open until you can see the Jellyfish King again through his cloud of swarming cnidaria. (This will also heal you a bit, which means you may even have a piece or two of Fish Meat left over when you're done!)

Then again, on my second playthrough my general strategy was to go directly into the Abyss after getting Energy Form just so that I could murder the Jellyfish King and take his stuff. And I thought that strategy made the game considerably easier. So I may possibly be an utter madman, leaving my advice no use to you or anybody else. 

[Mariofan09]

Well i got him, and out of 8 healing poultices 8 tasty rolls 2 legendary cakes and a sight poultice i got out with a legendary cake 

[Inyssius]

That is generally how it goes, yes.  Congrats! Enjoy your adorable jellyfish hat, for it is like unto a tiny blue haberdashery god.

[Xiagan]

I thought I'd try some of the recipes and overpower myself just for fun. I ate: swordfish roll (had blaster pet), tough cake, spider roll, spicy roll and veggie soup. Then I swam, constant firing, in circles.

It was a piece of cake and not even necessary to eat the jellies away. 

This works too.
Spider roll and something to upgrade your shot are really good choices. Some regeneration stuff is neat too.

[RoadCrewWorker]

I beat most bosses by advancing in the story until i had the last form, which is fantastic for crowd control.

[doc]

I thought this guy was looking hard, but fish form poison allows you to outrun the smaller ones and kill the bulk of them allowing you to make quick work of the king.

[Xiagan]

I thought this guy was looking hard, but fish form poison allows you to outrun the smaller ones and kill the bulk of them allowing you to make quick work of the king.

I use it waaay to seldom. Never think about it. Did a nice job with the sunworm, though...

[Lady-Succubus]

There's a fish form poison?

What exactly can the fish form do? I think I missed most of its abilities. @.@

[Inyssius]

What exactly can the fish form do?

Oh, almost nothing. It swims through little passages, a couple of really annoying enemies ignore them (starmies and leeches and two or three others), and they can blow bubbles.

Seriously, that's their right-mouse-button power. Little tiny bubbles.

That's pretty much it.

But there's this one item, the Swamp Cake (made with a Healing Poultice and a Rotten Cake, yum yum), that makes those bubbles poisonous for thirty seconds.

(At least, so I hear. I've never bothered to make any, because I don't really use Fish Form.)

[Xiagan]

Nearly right.

Firstly, you can trap other beings in the bubles. If I'm not mistaken, it's even possible to trap the priests in Mithala.

And the bubbles don't get poisonous, you get really nasty farts and poison everything behind you in big poisonous clouds.

[sonia]

But there's this one item, the Swamp Cake (made with a Healing Poultice and a Rotten Cake, yum yum), that makes those bubbles poisonous for thirty seconds.

Oh, so that's how that works.  I was trying to use this in the King Jelly battle and wondering how come the little jellies didn't seem to be dying off.  I thought "fish form poison" meant the fish just automatically exudes poison clouds while it swims.

[Xiagan]

But there's this one item, the Swamp Cake (made with a Healing Poultice and a Rotten Cake, yum yum), that makes those bubbles poisonous for thirty seconds.

  I thought "fish form poison" meant the fish just automatically exudes poison clouds while it swims.

Yes, he does exactly that. Nothing with poisonous bubbles.

[Lady-Succubus]

There are so many things in Aquaria that they don't explain to you. ._.