May 22

May 22, 2017

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Nudibranch name change

According to the web page found at http://www.urgdiveclub.org.au/scientific-names-do-change/ , “two-part scientific names contain a hierarchy which can change if an organism is re-classified”. I wrote about this topic in my article titled “Changes to Seastar Names” at http://mlssa.org.au/2010/10/07/changes-to-seastar-names/ . It can be difficult for ‘hobbyists’ such as ourselves to keep up with the changes for projects such as our Photo Index. It recently came to my attention, thanks to Society member Jeff Bowey, that the red-netted nudibranch previously known as Chromodoris…

Posted in Marine invertebrates, Molluscs, Nudibranchs | By

May 10

May 10, 2017

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Normanville Jetty and Hotspot

David Muirhead says that the Normanville jetty is “a pretty poor excuse for a jetty”. “I have, however, found some surprisingly good photographic subjects on the piles at high tide, which is all the more titillating given the entire jetty can be above the water mark,” he says. (The present jetty is the second Normanville jetty. The first one was a short distance to the south of the current one but, after severe storm damage, it was decided that repairing…

Posted in Bony fishes, Dive Reports, Jetties, Maritime History, Syngnathids | By

May 3

May 3, 2017

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The Rescue of Australian Prisoners of War following US attack on Japanese ships during WWII

In 1944, hundreds of Australian and British prisoners of war (PoW) held by the Japanese were briefly held at the River Valley Road Camp in Singapore. They were then going to be sent to Japan to work in coalmines there. A convoy of eight vessels with PoW onboard left Singapore on 6th September 1944. The vessels in the convoy comprised of the 10,000-ton Kachidoki Maru (formerly the American ship President Harrison), two oil tankers, two cruisers, a corvette, another small…

Posted in Maritime History | By

Apr 30

April 30, 2017

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South Australians onboard the final voyage of the Titanic

I had a bit of a surprise when I visited the cemetery at the Aldinga Uniting Church recently. I had gone there to photograph the Star of Greece memorial there. Star of Greece memorial (Taken by Steve Reynolds) I found a couple of graves in the name of McRae near the memorial. What caught my eye was a headstone for the McRae family with a reference to the Titanic. The headstone for the McRae family (with a reference to the…

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Apr 27

April 27, 2017

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Shrimps, Seadragons and Siphonognathus argyrophanes

Shrimps, Seadragons and Siphonognathus argyrophanes (As told to Steve by David Muirhead) The fish Tubemouth, Siphonognathus argyrophanes, looks very pipefish-like, and many veteran divers incorrectly think that they are true pipefish. They are, however, in the same family as wrasses (Labridae), which includes the ‘rock cod’ or ‘parrotfish’, plus weed whiting and western blue groper (which strictly should be called a western blue groper wrasse because it’s completely unrelated to tropical groupers like the giant Queensland Grouper). Tubemouth, Siphonognathus argyrophanes…

Posted in Bony fishes, Citizen Science, Crustaceans, Syngnathids | By

Apr 14

April 14, 2017

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Goby Gets Nice Eye Rings

David Muirhead took this photo of a goby at Rapid Bay jetty in April 2016: – Goby at Rapid Bay jetty He has speculated in the past about why they (Grooved-cheek gobies?) get “nice eye rings”. He says that they can have gold irises or eyebrows. David thinks that they are probably Grooved-cheek gobies, Nesogobius species. They have also been called Opalescent goby. One of David’s photos of a Grooved-cheek or Opalescent goby featured as the background image for December…

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Apr 13

April 13, 2017

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Update on the wreck of the AV Ulonga

This photo of the AV Ulonga at the North Parade Wharf in Port Adelaide was posted on the Facebook page for The South Australian Ketch Fleet recently: – The Ulonga at Port Adelaide circa early 1960s (Source: https://www.facebook.com/234583500036716/photos/a.237879926373740.1073741831.234583500036716/775086302653097/?type=3&theater ) It came with these details: – “Three mast auxiliary schooner “Ulonga”, at North Parade Wharf, Port Adelaide, sometime in the very early 1960’s. The bow of the ship near her bow belongs to the schooner “Coringle”, also engaged in the same…

Posted in Maritime History, Shipwrecks | By

Apr 10

April 10, 2017

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Spotting Pipefish

David Muirhead and I had Facebook conversation about finding pipefish with one-time Society member Ron Bellchambers recently, after David had posted this photo of a Crested pipefish on his Facebook page: –   Crested pipefish (a.k.a Briggs Crested pipefish) (Taken by David Muirhead) (This Crested pipefish is typically cryptic below detrital seagrass leaf on silty sand @ 4 m depth Second Valley 5-4-17. The crest of its dorsal fin is just visible where its trunk meets the seagrass blade) I subsequently…

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Apr 9

April 9, 2017

Rhodoliths

As divers, we see all different kinds of marine algae underwater, but identifying the species can be tricky for most of us. There are greens, browns, reds and even blue-greens. Then there are Dinoflagellates (Division Dinophyta) and different seagrasses (Angiosperms). Algae at Rapid Bay jetty March 2017 (Taken by Steve Reynolds) Green algae belong to the Division Chlorophyta. Brown algae belong to the Class Phaeophyceae of the Division Heterokontophyta (Phaeophyta). Red algae belong to the Division Rhodophyta. Blue-green algae belong…

Posted in Algae, Plants | By

Apr 9

April 9, 2017

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Photo of a Smooth Toadfish Blind in One Eye

In 2014, David Muirhead wrote an article titled “Opalescent Eye of Toadie – Reflecting on refracted light” – see http://mlssa.org.au/2014/08/11/opalescent-eye-of-toadie-reflecting-on-refracted-light . A Smooth Toadfish with two good eyes (Taken by David Muirhead) The article features a slide show of four toadfish images, along with comments such as “I’ve many dozens of similar shots of this adult individual and numerous other smooth toadies. Some are juveniles or sub-adults, while most show equal, or maybe even better, opalescent appearance of the nearer pupil. The colour is…

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