Author: David Muirhead

Canopy algae are a major component of Blue Carbon fixation. Whilst diving at The Bluff (Rosetta Head) on 27th October 2022, I found this Western Pacific Purple Sea Urchin, Heliocidaris…

This is an old low, resolution slide scan of an adult tubemouth, Siphonognathus argyrophanes, likely being cleaned by some pencil weed whiting among the Posidonia under the eastern arm of…

This large sponge in the Darwin Art Gallery and Museum reminds me of how prawn trawling decimated our SA gulfs soft bottom habitats and meadows: – I also think about…

I see similarities between the recent and seemingly quite rapidly escalating decline in Port River dolphin numbers and the continuing extinction trend in the bushland birds of Adelaide and the…

I wanted to do a shallow sub-tidal snorkel at the cliff base at Carrickalinga. I was able to do a shore entry via a walking track from the North Bay…

Dear Sir/Madam/Staff Concerned, I, as Secretary of the Marine Life Society of South Australia Inc. (hereafter MLSSA Inc) ,with the President and Committee’s unanimous support, do hereby provide our position…

This photo was taken at Rapid Bay between the old and new jetties: The fish in the background, behind the adult Castelnau’s (aka Pretty polly) wrasse, is an older, juvenile Bridled…

This photo of the Normanville SLSC was taken from the “Syngnathid Hotspot” site: – Normanville SLSC (Taken by David Muirhead) ‘Syngnathid Hotspot’ (colloquial term only) is that area of shallow…

I recently collected a small congolli that I found effectively ‘belly up’. The small congolli effectively ‘belly up’ (Taken by David Muirhead) Actually, it was lying on its side, on…

In the afternoon of 3rd October, I saw a pair of (what I STRONGLY suspect were) some sort of pygmy or dwarf cetacean, species indeterminate. I saw them from the…