go to jabu-labu then give him a fish and then get the boomerang and then when you beat the 1st boss then you go to the 2nd boss that is barinade
You have to beat the boss, Barinade.
defeat Barinade
Barinade
Barinade is the boss of Inside Jabu-Jabu's Belly, the third dungeon in The Legend of Zelda: Ocarina of Time. This parasitic organism is revealed to be the cause of Lord Jabu-Jabu's gastrointestinal distress. It appears to have a symbiotic relationship of some sort with Bari.
The THird OOT boss is Barinade, Who you fight in Lord Jabu-Jabu's Stomach. He's quite easy. Really. Don't die when or if you fight him.
Ahoy, there. o/ Queen Gohma (Inside The Deku Tree) King Dodongo (Dodongo's Cavern) Barinade (Inside Jabu Jabu's Belly)
Go through the entire dungeon and defeat Barinade, after which you'll free Ruto and get the Zora's Sapphire.
While the game doesn't show this (you're supposed to be the hero who never gives up, after all), what most likely happens is that she's trapped in Lord Jabu Jabu without a way to get out. She'll never be able to go back to her father, who is worried sick about her, and there's the possibility that she ends up getting killed by Barinade.
Keep your distance from it, and z-aim at it while using the boomerang on its tentacles. Afterwards; it should spin around. If it starts spinning, z-aim once again and use the boomerang on its body to stun it. While it is stunned, hit it with your sword to hurt it. Try to dodge all of its attacks though, because it's very tricky to beat and the damage from its attacks stack up over time and do a load of damage. If you do happen to be low on health, simply break the pots around the room and you may get hearts to restore your health.
Ahoy, there. o/ Simply go guiding Ruto through the Dungeon. (PS: On the room you first met her, memorize where's the hole where there is a green slimey thing. When you come back up with her and get past that 5 rooms, including the one with the Boomerang. Fall on the hole that green thing was blocking and cross the door, on that platform. Throw Ruto onto the platform to get rid of her and defeat the "Oktopus" (dunno his name). Keep going and, when you need to press a button that need to have some weight on it to keep pressed place the wooden box on it. To pass the parts with the moving red thing, simply throw the Boomerang on it to freeze it. If you keep going, you'll soon catch up with Barinade. Defeat it, get the Heart Container and go get the Spiritual Stone of Water, Zora's Sapphire.
If you go past King Zora into the Zora Fountain, and go to where Lord Jabu Jabu was and follow the floating ice to the left you'll get to the Ice Cavern. Beat it to the end and you'll get to a fireplace. Make sure you have an empty bottle. Or, you can buy it in Kakakiro village for 300 rupees from the potion shop. I think there's other places, but those are the ones that I know.
You get the third one your the temple of time. To get there go to where you got the master sword and stick it back in. Go to the door that just opened and to will be i the past. Go to the same room where you got the master sword ( in the past ) do the same it you did before and stair will appear. Go up the forward to be in the temple of time.