Viewing: April, 2018
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 morePosted in Cnidaria, Marine invertebrates | By Steve Reynolds
April 4, 2018
The Removal of Shark Parasites
I recently saw some film footage on an episode of David Attenborough’s “Blue Planet II” showing several silky sharks, Carcharhinus falciformis, seemingly scraping parasites off of a whale shark, Rhincodon typus. It occurred to me that this was a form of fish cleaning to add to my growing list. I found confirmation of what I had seen on “Blue Planet... Read morePosted in Bony fishes, Sharks & Rays | By Steve Reynolds
April 4, 2018
The Lifespan and Maximum Length of Grey Nurse Sharks
According to the Facebook posting at https://www.facebook.com/FisheriesWA/photos/a.264218617326814.1073741827.246412385774104/486516945096979/?type=3&theater , a tagged 2.5 metre grey nurse shark, Carcharias taurus, caught by a recreational fisher in WA had been caught and released by Fisheries scientists 23 years earlier. Back in 1995, the shark was nearly 1.9 metres long and it was estimated to be four years old. This would mean that the shark... Read morePosted in Sharks & Rays | By Steve Reynolds
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 morePosted in Cephalopods, Marine invertebrates, Molluscs | By Steve Reynolds