Is this Another Scyphozoan?

[PhilipS]

First time seeing this creature. At first I thought it was a ring of eggs. Darn. Establish old lava rock in a nano tank. There's only one of these and it keeps resting on the glass. That's fine for now.

A very active bell, nine oral arms, and a unique tentacle pattern.

I suspect it arrived from Hawaii with the last batch of Opae Ula shrimp.

Hydroid?

 

[KJ]

Medusae hydroids.