Observações de davemmdave

The several very small scale fish, in several images taken through the surface of some small, very shallow tide pools at low tide off Home Beach
Perhaps a type of Atherinid but I don't really know. There were small schools, rarely more than about 6-6 per school and they normally swam on the surface but would hide under small algal plants such as Neptune's necklace when not totally disoriented by torch or headlamp beams.

The blue bit of drift brown algae, at night, low tide, lower beach just inshore of the reef platform at Home Beach Groper Bay. The colour is as seen with the naked eye, as described for a few earlier posts from the same location.

Two medium sized juveniles at about centre and above and slightly R of that. Snorkel late afternoon on the day we arrived at Flinders Island. Nice high relief reef on southern side of Groper Bay, but very surgy snorkelling and water clarity was mediocre for the location.

The light brown macroalgae in foreground in image 1 and the light brown macroalgae just L of centre in image 2 are probably the same species but if anyone disagees I'll happily separate them into 2 observations. Receding tide at dusk along the southern ledges of the main platform intertidal reef at Home Beach Groper Bay.

The light brown to grey (almost slate blue in places) macroalgae.
Littoral zone close to shore, receding tide, dusk snorkel in surgy conditions (despite being a more protected part of the intertidal platform reef off Home Beach Groper Bay).

Tentative ID. Receding tide, rock pool in littoral zone towards southern end of Home Beach, Groper Bay. This fucoid brown was locally common but restricted to the shallow subtidal in the most protected parts of this platform reef.

Subject is the two irregular stone-like white objects, amongst some shells I've placed around them on the beach in front of the homestead accommodation. These are rhodoliths, beach washed. They are quite plentiful here.

A less dramatic example of this tendency for some species of drift brown macroalgae to develop bluish tinges during decomposition and decay. A prominent feature of the shallow littoral zone at various sites around Flinders Island but most easily observed at Home Beach Groper Bay, which is a relatively sheltered beach in the context of this island's generally very exposed and quite remote offshore position in the eastern GAB.