Trident is a mysterious object found by Zac. It looks similar to Poseidon's Trident from myth and it can control lightning, and possibly can do more. In Zac Returns to Mako, Zac takes a portal from Trident Cave into the ocean that has the Trident in it, but he leaves before he can grab it. In Betrayal, Zac takes a portal from Trident Cave into the ocean and grabs it, but Lyla tries to take it away from him. It sparks out of control and kicks everyone out.
In I Don't Believe In Mermaids, Rita reveals that a pod of mermen took the Trident into battle and the mermaid pods had to draw upon the power of the oceans to defeat them. The Trident was locked away to prevent a similar situation from happening.
- In center of the pronged area appears to be a larger version of the stones in the Moon Rings.