Viewing: Cnidaria

Mar 28

March 28, 2019

Hyperiid amphipod commensalism with Jellyfish

“Hyperiid amphipod commensalism with Jellyfish” by Steve Reynolds The cover for the March 2019 issue of Dive Log magazine featured a photo of a nautilus perched on top of a jellyfish (or sea jelly). It was taken by Mike Bartick (ending with a ‘k’) from the USA. Details can be found at . The caption on page 4 explained... Read more

Posted in Cnidaria, Crustaceans, Marine invertebrates, Underwater Photography | By

Jan 28

January 28, 2019

Second Cerianthid Sighting at Second Valley

About 4 years to the day later, I have possibly found the same Cerianthid anemone in the same location. I was diving with the same dive buddy, and it was he who pointed the anemone out to me (although he didn’t recall it afterwards). My previous sighting of a Cerianthid anemone was at Second Valley on 6th January 2015. Allan... Read more

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Apr 22

April 22, 2018

The discovery of tiny Upside-down Jellyfish, Cassiopea ndrosia, in West Lakes

As a result of my first discovery of Upside-down Jellyfish, Cassiopea ndrosia, in December 2016 (The Upside-down Jellyfish, Cassiopea ndrosia ), I was able to recognize the species occurring in the hundreds when I dived in West Lakes in March 2018. I first saw a single tiny specimen: – I moved in to take a closer look: – A little... Read more

Posted in Cnidaria, Marine invertebrates | By

Jun 26

June 26, 2017

Bolinopsis, Port Bonython 2017 - Dan Monceaux

The comb jellies Bolinopsis and Mnemiopsis

I took this ‘one off’ shot of a clear jelly during my dive at Moonta Bay jetty in June 2017. While the photograph is enigmatic, my observations were sufficient for me to pursue a positive identification of the species. It turned out to be a comb jelly, and my interest in the animal was piqued and extended with help from... Read more

Posted in Cnidaria, Invasive species, Jetties, Marine invertebrates | By

Dec 13

December 13, 2016

The Upside-down Jellyfish, Cassiopea ndrosia

The last thing that I expected to be doing on the first days of my recent retirement from work was studying jellyfish, but that’s exactly what happened! That’s just the way that things go sometimes. It all started over the Queen’s Birthday holiday long weekend last June though, as far as I can determine. That was the weekend that I... Read more

Posted in Cnidaria, Marine invertebrates | By

May 5

May 5, 2015

Tube Anemone Sighting at Second Valley

During my Christmas break in January 2015, after not being able to dive for several months between early September and the end of December 2014, I managed to do three dives in the space of one week. Apart from making up for lost time, I was also preparing for a couple of dives that I had booked in Waikiki, Hawaii that... Read more

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Dec 21

December 21, 2014

The Swimming Anemone, Phylctenactis tuberculosa

The swimming anemone, Phylctenactis tuberculosa, may vary in colour from the usual dull orange-brown to olive, to red-brown, to orange, pale pink and light to dark grey-blue, and often combinations of these colours (according to “A field guide to the marine invertebrates of South Australia” by Karen Gowlett-Holmes). I took this photo of a swimming anemone at Port Victoria in... Read more

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Oct 15

October 15, 2014

A Swimming Anemone’s mistaken identity

The unusual form of the Swimming Anemone was recently mistaken for a bubble coral. Fortunately the Marine Life Society of South Australia’s expert eyes picked up on the error and politely set the record straight. Invertebrate blogger and author of Aristotle’s Lantern Heather Lynn initially suggested on Facebook that the following photo was beyond its known range of distribution. Guerilla Bay... Read more

Posted in Citizen Science, Cnidaria, Coral, intertidal zone | 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... Read more

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

Aug 2

August 2, 2014

Velella velella, the By-the-Wind-Sailor

Society member, Geoff Mower, recently sent us a message as follows: – “A few years ago I was travelling in New Zealand, and wandered in the late afternoon along Keri-Keri Beach, just north of Auckland. Keri-Keri is one of NZ’s well-known black sand beaches, and is worth visiting for that reason alone. If you need another reason, this is the... Read more

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