Viewing: Marine invertebrates

May 14

May 14, 2018

Sprouting Sand Sponges

Our participation in iNaturalist has created some discussion that has almost cleared up an enduring mystery about the identification of this creature: – Image No.2555 from MLSSA Photo Index (Taken by David Muirhead) It has been some 11 years since my article titled Sponges of the Genus Ciocalypta was published in our May 2007 newsletter.  In that article, I wrote... Read more

Posted in Marine invertebrates | By

May 3

May 3, 2018

Tropical Stromb found on Largs Bay Beach

Steriyoula Thethes recently posted some photos of a couple of shells from Largs Bay beach on the SA Natureteers Facebook page, as follows: – (Photos courtesy of Steriyoula Thethes) “A new species of shell, Largs bay. And the last image of a shell that is becoming more common in the same area of Largs North”, said Steriyoula. There were a... Read more

Posted in Marine invertebrates, Molluscs | By

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

Apr 4

April 4, 2018

The blanket octopus, Tremoctopus violaceus

Andrew Wright, General Manager for Calypso Star Charters, recently sent us some photos of what he thought was a blanket octopus that had swum into their shark viewing cage at the North Neptune Island marine park on Good Friday. (Click on the following images to enlarge them.) The octopus that swam into the shark viewing cage (Photo courtesy of Andrew... Read more

Posted in Cephalopods, Marine invertebrates, Molluscs | By

Mar 5

March 5, 2018

Sea Pigs

The sea pigs reported in our 2013 Journal feature in episode 2 of David Attenborough’s “Blue Planet II” which was shown on Channel 9 TV recently. The episode can be viewed at https://www.9now.com.au/blue-planet-ii/2018/episode-2 . I first heard about sea pigs via a Facebook post in 2013. The post at https://www.facebook.com/photo.php?fbid=666774150010266&set=a.456449604376056.98921.367116489976035&type=1&theater stated, “Sea pigs are marine animals around 15 cm long... Read more

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Mar 5

March 5, 2018

Osedax worms feature in episode 2 of David Attenborough’s “Blue Planet II”

Osedax worms feature in episode 2 of David Attenborough’s “Blue Planet II”. The program was shown on Channel 9 TV recently. I was able to watch it on my PC a week later. Episode 2 of Blue Planet II can be found at https://www.9now.com.au/blue-planet-ii/2018/episode-2 . A ‘whale fall’ is shown at about 19.30 minutes in to the program. It goes... Read more

Posted in Marine invertebrates, Whales & Dolphins, Worms | By

Jul 9

July 9, 2017

The Branched Feeding Tentacles of Dendrochirotid Sea Cucumbers

I recently posted this photograph on the “ID Please (Marine Creature Identification)” Facebook page, asking “Are these sea cucumber tentacles? Taken at Port Stanvac, South Australia.” I soon received a reply from Frédéric Ducarme saying “Yes, dendrochirotid sea cucumbers.” Frederic provided me with a link to Wikipedia where it read ““Dendrochirotida are an order of sea cucumbers. Members of this... Read more

Posted in 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

May 22

May 22, 2017

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... Read more

Posted in Marine invertebrates, Molluscs, Nudibranchs | By

Mar 25

March 25, 2017

FURTHER DISCOVERIES AT THE SHIP’S GRAVEYARD

In addition to my recent discovery of an Oyster Blenny at the Ship’s Graveyard in the North Arm of the Port River, I also found this bivalve mollusc shell there: – I checked it out further when I got home. I thought that it was a Venus shell, Tapes literatus. I photographed it with my mobile phone at home and... Read more

Posted in Bony fishes, Invasive species, Marine invertebrates, Molluscs | By