Viewing: Marine invertebrates

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 . I first heard about sea pigs via a Facebook post in 2013. The post at stated, “Sea pigs are marine animals around 15 cm long... Read more

Posted in Marine invertebrates | By

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 . 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 , “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 . 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


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

Dec 14

December 14, 2016

Acorn worm’s ‘Wolverine’ style healing powers

According to a recent report in the Sunday Mail (4/12/16), acorn worms can apparently regrow any of their body parts from nothing. The report was written by Harry Pettit from Washington, USA. He says that “researchers hope that unravelling the worm’s DNA could lead the team to human limb regeneration”. The researchers involved are from the University of Washington and... Read more

Posted in Marine invertebrates, Research, Worms | 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

Nov 27

November 27, 2016

The Predatory Behaviour of an Eleven-armed Star Fish

During our recent dive at Rapid Bay jetties, I recorded a large eleven-armed star fish attacking an abalone. I have to admit that I set the whole thing up though. I was swimming along the side of the new jetty’s piles when I came across this abalone at the base of a jetty pile. It was attached to a small... Read more

Posted in Marine invertebrates, Molluscs, Seastars | By

Sep 8

September 8, 2016

What Is CIGESMED for Divers?

In November 2013, I hosted Vasilis Gerovasileiou from Greece during his visit to South Australia. We only managed one dive together though. We managed a dive at Rapid Bay jetty on16th November 2013. Vasilis had only brought a 5mm wetsuit with him for his dives in Australia. This suit probably served him well for dives in WA & Queensland, but... Read more

Posted in Citizen Science, Marine invertebrates, Molluscs, Research, sea urchins | By