Hydroids don't get a lot of love in the human world (nudibranchs are connoisseurs, of course), but they're often some of the most beautiful animals out there. They're also tiny, weird, and kind of hard to to ID. These aren't huge, aren't fouling, and don't have annulations below the medusae, so... Pinauay marina?
Tubularia (if that's what this is) is tricky to get with the G9. It kind of waves around in the current, and it's a pretty small target to focus on. Still, it's so pretty, it's hard to resist.
