Understanding, enjoying and caring for our oceans
The Nature Glenelg Trust (NGT) has been involved in researching and monitoring Goolwa pipi (cockles) population dynamics and associated aspects e.g. recreational pipi extraction impacts. Open season is currently November to May, with a maximum daily bag limit of 300 cockles daily per person. There is also a minimum size […]
One of the earliest observations that we made during our dive at the old Rapid Bay jetty on 9th December 2022 was that the Scaly Fins were guarding the egg nests. They became quite aggressive when we approached anywhere near to their nests. They would swim straight at our face […]
According to an article on the Australian Museum blog, The fish list: A decade in the making by Dr Joseph DiBattista, Curator, Ichthyology, Australian Museum, “the number of fish species recorded from Sydney Harbour now stands at 675 (Based on independent data sources)”. (The Staff Profile for Dr Joseph DiBattista […]
My snorkel buddy Dan and I sighted this Smooth Stingray, Bathytoshia brevicaudata, in Angas Inlet (between Torrens Island & Garden Island) in early February 2017: – We had been snorkelling at the Garden Island fishing platform (jetty?) before we decided to swim across Angas Inlet to Torrens Island. It was […]
Whilst diving at the old Rapid Bay Jetty on 25th October I saw the first decent aggregation of the Great Spider Crab, Leptomithrax gaimardii that I’ve seen for some years now. There were probably more than 200 crabs seen by us today, and there would have been more outside our […]
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 erythrogramma: – I have posted it on iNaturalist, along with the following details, at https://inaturalist.ala.org.au/observations/140727962 . Overall, I saw relatively […]
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 the T-section of the old outer Rapid Bay jetty in around October 1992: – (The photo is suggestive but not […]
David Muirhead recently posted this photo of a bluethroat wrasse, Notolabrus tetricus from old Rapid Bay jetty on 1st October 2022 on iNaturalist at https://inaturalist.ala.org.au/observations/139393179 : – David gave the posting the following description (but with my punctuation, or the computer’s): – “SUBJECT is the wrasse parked vertically near the […]
Members of both groups attended a Green Adelaide-sponsored, Mudflat Monitoring Workshop at West Beach on the evening of 15th September, where researchers from Flinders University, including the current President of the Royal Society of South Australia, Professor Sabine Dittman, handed out hard copies of a draft Mudflat Monitoring Manual for […]
Society member Chris Iwanicki found this ‘fishing photo’ of a Harlequin Fish recently: – He brought it to our attention, saying “This picture reminded me again of the fact that most of the marine life has not any sort of protections in place and this needs to change to preserve […]