1. You go to Poseidon's realm then go in the water and dive down where it says DIVE. You have to go down to the bottom of the sea then you will see the cave.
2. You will see this 5-headed monster to defeat the monster: when one of the heads try to get you jump on the head. Once you defeated the monster go where the body's are then you will see the scale. After you get the scale, swim back to the shore. VOILA
There is no scale. I have already beat it.
Just 1
You jump on its heads and it will give you the scale.
you have to bounce on the heads when they come at you so you can knock them out.
You jump on its heads and it will give you the scale.
You jump on its heads and it will give you the scale.
You get the Scale from the a three headed dragon that you have to slay in a cave that's to the left of the wierd lizard woman thing
Your quest on Mythology Island is to give Zeus the 5 items;the rose, the whisker, the scale, the pearl, and the golden ring. To do this, you have to get the apple (to summon Zeus and then actually get the quest).
Collect the rest of the five sacred items and return them to the Tree of Immortality.
You stomp on all there heads and then it falls off
The hydra is underwater in Posidons temple/house. Once you get inside the house there is a big "pool". You can go to the one area and there is an opening. The hydras at the end of a maze underwater.
To put the hydro scale on the altar in Mythology Island on Poptropica, you first need to obtain the hydro scale from Poseidon. To do this, solve the underwater labyrinth puzzle and find Poseidon's throne room. Once you have the hydro scale, return to the altar in the Grove of Temples and place it on the pedestal to activate the power of the gods.