Viewing: Marine invertebrates

Oct 16

October 16, 2018

Elysia expansa, Fletcher's Dock 2018

The Port River – over 100 marine and coastal species and counting

I was first inspired to pay more attention to this often overlooked ecosystem by the discovery of the upside-down jellyfish, Cassiopea sp. there in 2016 by MLSSA president and area resident, Steve Reynolds. My personal explorations soon followed, beginning at Garden Island. There, a snorkeller can easily step into the water and explore several contrasting habitats within tens of metres:... Read more

Posted in Art & Culture, Citizen Science, Crustaceans, Mangroves, Marine invertebrates, Pollution, Underwater Photography | By

Oct 13

October 13, 2018

The Occurrence of the Venus shell, Tapes literatus, in the Port River

Last year, I found a Venus shell, Tapes literatus at the Ships’ Graveyard in the North Arm of the Port River. I reported the discovery in my article entitled Further Discoveries at the Ships’ Graveyard. More recently, two more specimens were found on the western side of Torrens Island (8 October 2018). My kayak partner (known only as Greg) picked up... Read more

Posted in Climate change, Invasive species, Marine invertebrates, Molluscs | By

Aug 18

August 18, 2018

South Australian marine biodiversity explodes onto iNaturalist.org

Marine Life Society of South Australia members need no reminding of the wonderful diversity of species present in our state and commonwealth waters. But how widely known is this out in the wider community? Up until the late 2000s, I would argue that local familiarity with marine ecology was severely limited. Those practising in specialised niches of scuba diving, marine... Read more

Posted in Citizen Science, Marine invertebrates, Nudibranchs, Species lists | By

Aug 7

August 7, 2018

Cleaner Shrimp Study

I found these details online (at https://www.nationalgeographic.com/animals/2018/07/animals-fish-shrimp-health-communication/?cmpid=org=ngp::mc=crm-email::src=ngp::cmp=editorial::add=inside_20180806::rid=7315819595) via a National Geographic email: – It is an article titled “Secret Code Prevents Cleaner Shrimp from Becoming a Meal” and it was written by Liz Langley (Published July 7, 2018). It came with a sub-title of “Reef shrimp and their fish clients use special signals that communicate cooperation, a new study says”.... Read more

Posted in Bony fishes, Marine invertebrates | By

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

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 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