You go into sense mode and Z-target the bug. When it comes close with the electricity on it, move sideways then attack with A. Repeatedly press A until it falls into the water. Swim up to it, get on top and Z-lock on to it. Use the energy field to hurt all 6 legs at the same time. It is easier than it sounds! I only took 2 goes to defeat it!
The big key
there are three or four (if not more) big keys in the Twilight Princess game.
first you carry me to the gem im in talking about then I will say ahhh! what is this a octopus thing? Help!! young link will have to beat this big octopus thingy and you are not done with bosses there is one more boss you have to beat. sincrely, Princess Ruto
Find the big key.
Longshot Sorry For Correcting It Big Zelda Fan In The Water Temple After You Beat Dark Link You Get It
you have to beat up to crystal 5
his house is the big round one that you first see when you enter kakariko village
You have to throw bombs at his head.
Destroy the big boulder with a spider bomb and then get the key to set the monkey free ^_^
Target one of the bomb bugs with the boomerang, then target the boss' main head. the boomerang should pick up the bomb and slam it into the boss. The Big monkey will "help" you out by swinging around with the bombs.
I'I'm sorry but you have to be more specific because their are many dungeon keys throughout the game
You have too find the hidden knife and cut off Big Boo's dick!