Viewing: Cephalopods

Jun 6

June 6, 2016

Large Octopus Beach-washed at Petrel Cove

We recently received an email message reading “Howdy! I found this Octopus washed up at Petrel Cove and I can’t figure out what species it is. I estimate its leg span to be about 1.5m. Annelise Johnson” The message was accompanied by this photo of the beach-washed octopus: – Our reply to Annelise was: “Hi Annelise, That’s a beauty! The one species that occurs in SA with a large leg span is the Maori Octopus (up to 3m). What became…

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Mar 19

March 19, 2015

Alan Paskett - Sepia apama, Black Point, 3-4m June 2014

Cuttlefish of South Australia

Before I embarked on the production of the documentary film Cuttlefish Country, I had little appreciation of the diversity of cuttlefish species which are found in South Australian waters. When I discuss cuttlebones with friends or strangers, I’m usually met with surprise at the revelation that cuttlebones found in beachwash along the South Australian coast represent not one, not two but several species of cuttlefish. It is also unfortunate that there is no single resource available whereby South Australian naturalists or beach combers…

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Feb 14

February 14, 2015

Scientists studying the mating tactics of giant Australian cuttlefish

When giant Australian cuttlefish, Sepia apama, mate, they meet head-to-head and embrace. The male uses a specialised arm to squirt his sperm in to the mouth of the female. There is some short video footage by Roger Hanlon from the Marine Biological Laboratory in Woods Hole, Massachusetts available. According to that same web page, “To initiate sex, a male spreads his arms around his partner’s head . . .. Once the deed is done, the female stores the deposited sperm…

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Dec 16

December 16, 2014

Sepia officinalis © Sebastian Niedlich CC BY-NC-SA 2

New research shows shipping sound impacts cuttlefish

Cuttlefish become stressed when exposed to shipping sound and panic when exposed to loud, low-frequencies, according to two scientific papers published this year. The Marine Life Society of South Australia believes that these results should trigger increased research efforts into the impact of shipping noise on the Giant Australian cuttlefish aggregation at Point Lowly, near Whyalla in South Australia. They argue that the matter is time critical, given anticipated shipping increases should current iron ore export plans receive environmental approvals this month. In a study published…

Posted in Acoustics, Cephalopods, Marine invertebrates, Molluscs, Pollution | By

Oct 7

October 7, 2014

cuttlefish and purple sea urchin at Point Lowly by Dan Monceaux

Aristotle’s lantern and other ‘invertebrate bits’ by Heather Robertson

Heather Lynn Robertson/Stoker writes a blog on marine invertebrates entitled Aristotle’s Lantern. As the title of her blog suggests, Heather seems to be particularly keen on sea urchins. In her own words, “Aristotle’s lantern… is a hard, calcareous feeding structure comprised of very intricate parts unique to sea urchins.” Here is a small excerpt from one of Heather’s recent blog posts: “So this is the underside or oral surface of Spike, a purple urchin (Arbacia punctulata) that I had in…

Posted in Cephalopods, Cnidaria, Coral, Creative writing | By

Oct 2

October 2, 2014

Alan Paskett - Sepia apama, Black Point, 3-4m June 2014

Marine Life Society of South Australia slams cuttlefish acoustic impact study

The Marine Life Society of South Australia has condemned a recent study into the potential impact of shipping noise on the Giant Australian Cuttlefish aggregation claiming that the study is scientifically flawed and does not prove that shipping has not adversely affected the population. The Society is concerned that the report may be used to justify the approval of the Port Bonython Bulk Commodities Export Facility near Point Lowly this month. Following the report’s release in April, secretary Dan Monceaux…

Posted in Acoustics, Cephalopods, Marine Protected Areas, Pollution | By

Aug 6

August 6, 2014

Western Blue Groper

Evolutionary biologist Professor Steve Donnellan’s ‘Wild lives of wildlife’

Several members of the Marine Life Society of South Australia attended a talk hosted by Butterfly Conservation SA last night. The guest speaker was Professor Steve Donnellan from the South Australian Museum’s Evolutionary Biology Unit, who led us on a curious tour through the sexual hardware of a wide range of terrestrial, avian and marine species. Diversity was the order of the day, and Steven made the point very clearly that the purpose of sex is to reproduce, and so long as…

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Jul 22

July 22, 2014

How Jeanette Power’s 19th century argonaut studies in aquaria led to a modern day paper

A PhD student called Julian Finn contacted us in 2006 seeking some information about Jeanette Power. Julian said that Jeanette Power was famous for resolving the truth that argonauts build their own shells. Julian is now Dr Julian Finn, Senior Curator of Marine Invertebrates for Museum Victoria. Back in 2006 he requested copies of some papers regarding Jeanette Power for a literature review that he was doing. It was intended for publication in the Journal of Molluscan Studies. The papers…

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Jun 4

June 4, 2014

Alan Paskett - Sepia apama, Black Point, 3-4m June 2014

Underwater photographers focus on Whyalla’s biodiversity

This long weekend, divers and snorkelers from Adelaide and Whyalla will unite to explore and photograph the biodiversity of Upper Spencer Gulf. The Whyalla Underwater Shootout will encourage young and old to explore the region’s rocky and artificial reefs, sandy bottoms, sea grass meadows and mangroves to show that there’s more to Whyalla’s waters than the Giant Australian Cuttlefish aggregation. The event is hosted by the Marine Life Society of South Australia, a not-for-profit organisation which was founded 38 years…

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May 13

May 13, 2014

Southern Right Whale - SA Whale Centre - May 2014

Whale season launch at the SA Museum – May 27, 2014

The Marine Life Society of South Australia is pleased to announce that we will have a stall at the SA Whale Centre’s official whale season launch event, to be held at the South Australian Museum on May 27th, 2014. Our stall will feature an audio-visual display of South Australian marine life, and a sneak-preview of a very special new computer game two of our members have designed to help engage children with our local marine environment and some of its iconic…

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