John Turnbull PhD
@johnwturnbull.bsky.social
Marine ecologist focusing on social-ecological systems, remote and protected areas; ROV, photogrammetry and UVC specialist; Reef Life Survey coordinator and Research Fellow at Uni of Sydney, www.marineexplorer.org
Nice to see substantial populations of Hippocampus whitei #seahorses on our surveys of two sites in #sydneyharbour today #marinescience #threatenedspecies 🧪🦑
June 27, 2025 at 6:26 AM
Nice to see substantial populations of Hippocampus whitei #seahorses on our surveys of two sites in #sydneyharbour today #marinescience #threatenedspecies 🧪🦑
In our final week of fieldwork at One Tree Island and we have almost completed surveys on 26 sites, with current loggers and microhabitat studies on many of them. A massive thanks to all concerned! 🧪🦑 #SAEF_ARC #SydneyUni #marineexplorer
May 19, 2025 at 10:14 PM
In our final week of fieldwork at One Tree Island and we have almost completed surveys on 26 sites, with current loggers and microhabitat studies on many of them. A massive thanks to all concerned! 🧪🦑 #SAEF_ARC #SydneyUni #marineexplorer
Whilst there is more dead coral than live, there are signs of growth throughout; small patches of live coral on broken reef, live tips on dead branches. The challenge of course will be when the next heatwave comes. For close ups: www.flickr.com/photos/johnw... #SAEF_ARC #marineexplorer
May 14, 2025 at 8:48 PM
Whilst there is more dead coral than live, there are signs of growth throughout; small patches of live coral on broken reef, live tips on dead branches. The challenge of course will be when the next heatwave comes. For close ups: www.flickr.com/photos/johnw... #SAEF_ARC #marineexplorer
Our latest paper highlights changes in the marine community at Shiprock in Sydney over half a century. #sydney_science #SAEF_ARC #marineexplorer 🧪🦑
Open access: doi.org/10.1071/MF24...
Open access: doi.org/10.1071/MF24...
May 12, 2025 at 8:31 PM
Our latest paper highlights changes in the marine community at Shiprock in Sydney over half a century. #sydney_science #SAEF_ARC #marineexplorer 🧪🦑
Open access: doi.org/10.1071/MF24...
Open access: doi.org/10.1071/MF24...
Wonderful diversity of critters on our surveys today at the Labyrinth, #onetreeisland #sydneyuni #SAEF_ARC #marineexplorer 🧪🦑
May 12, 2025 at 7:24 AM
Wonderful diversity of critters on our surveys today at the Labyrinth, #onetreeisland #sydneyuni #SAEF_ARC #marineexplorer 🧪🦑
Despite extensive damage from the recent cyclone and 2024 bleaching, there are some signs of recovery in the southern GBR #onetreeisland #universityofsydney #SAEF_ARC #marineexplorer 🧪🦑
May 9, 2025 at 8:46 PM
Despite extensive damage from the recent cyclone and 2024 bleaching, there are some signs of recovery in the southern GBR #onetreeisland #universityofsydney #SAEF_ARC #marineexplorer 🧪🦑
The photogrammetry stage of our field trip is now well underway, capturing reef complexity and biodiversity in great detail #one_tree_island #sydney_science #marineexplorer #saef_arc 🧪🦑
May 6, 2025 at 8:46 PM
The photogrammetry stage of our field trip is now well underway, capturing reef complexity and biodiversity in great detail #one_tree_island #sydney_science #marineexplorer #saef_arc 🧪🦑
Getting ready for a day in the field #SAEF_ARC #Universityofsydney ##marineexplorer #@OneTreeIslandRS 🧪🦑
May 4, 2025 at 11:35 PM
Getting ready for a day in the field #SAEF_ARC #Universityofsydney ##marineexplorer #@OneTreeIslandRS 🧪🦑
Day 5 of our University of Sydney research trip to One Tree Island, and we have refined our methods and completed 8 biodiversity surveys. Tomorrow we put out flow meters to measure lagoon currents, then start our microhabitat study in earnest. #marineexplorer 🦑 🧪
April 29, 2025 at 11:13 AM
Day 5 of our University of Sydney research trip to One Tree Island, and we have refined our methods and completed 8 biodiversity surveys. Tomorrow we put out flow meters to measure lagoon currents, then start our microhabitat study in earnest. #marineexplorer 🦑 🧪
Day 1 of #reeflifesurvey in JB; lovely warm, calm conditions for our first two sites 🦑 🧪
March 13, 2025 at 5:48 AM
Day 1 of #reeflifesurvey in JB; lovely warm, calm conditions for our first two sites 🦑 🧪
A few fishy faces (ok, two are invertebrates) from this morning's #reeflifesurvey at Camp Cove in #sydneyharbour. If you want to see the flathead (looks like just sand and paddleweed until you zoom in) see www.flickr.com/photos/johnw... 🦑 🧪
March 1, 2025 at 3:55 AM
A few fishy faces (ok, two are invertebrates) from this morning's #reeflifesurvey at Camp Cove in #sydneyharbour. If you want to see the flathead (looks like just sand and paddleweed until you zoom in) see www.flickr.com/photos/johnw... 🦑 🧪
Several endangered White's #seahorses on the nets in #SydneyHarbour during our surveys last weekend... and more red cuttlefish (A. mestus) than we normally see #marinescience #marineexplorer 🦑 🧪
February 9, 2025 at 6:52 PM
Several endangered White's #seahorses on the nets in #SydneyHarbour during our surveys last weekend... and more red cuttlefish (A. mestus) than we normally see #marinescience #marineexplorer 🦑 🧪
As we cross from the Coral Sea back into the GBR we have favourable winds and a nice big incoming tide; smiles all around! A few more sites in the GBR over the next few days before we wrap up #reeflifesurvey #marineexplorer 🦑 🧪
December 14, 2024 at 11:29 PM
As we cross from the Coral Sea back into the GBR we have favourable winds and a nice big incoming tide; smiles all around! A few more sites in the GBR over the next few days before we wrap up #reeflifesurvey #marineexplorer 🦑 🧪
Day 12 of #reeflifesurvey in the GBR and Coral Sea, and we are at Marion reefs around 400 km offshore. Some terrific sea life today particularly on our big bommie site. #marineexplorer 🦑 🧪
December 12, 2024 at 7:26 AM
Day 12 of #reeflifesurvey in the GBR and Coral Sea, and we are at Marion reefs around 400 km offshore. Some terrific sea life today particularly on our big bommie site. #marineexplorer 🦑 🧪
After 10 days of good weather we have completed #reeflifesurvey in the Capricorn Bunkers, Swains, Saumarez and Frederick reefs. The water is a beautiful blue in the Coral Sea but fish IDs are a challenge! Next: Marion reefs then back to GBR. Pics: www.flickr.com/photos/johnw... #marineexplorer 🦑 🧪
December 9, 2024 at 7:24 PM
After 10 days of good weather we have completed #reeflifesurvey in the Capricorn Bunkers, Swains, Saumarez and Frederick reefs. The water is a beautiful blue in the Coral Sea but fish IDs are a challenge! Next: Marion reefs then back to GBR. Pics: www.flickr.com/photos/johnw... #marineexplorer 🦑 🧪
Day 3 and we've been surveying around the Keppel Islands. Conditions were calm last night for our transit to the Capricorn Bunker group. #reeflifesurvey #marineexplorer #marinescience 🦑 🧪
December 3, 2024 at 9:43 PM
Day 3 and we've been surveying around the Keppel Islands. Conditions were calm last night for our transit to the Capricorn Bunker group. #reeflifesurvey #marineexplorer #marinescience 🦑 🧪
A few critters from today's #reeflifesurvey in the GBR, including a coral lobster and a couple of colourful nudis. www.flickr.com/photos/johnw... #marineexplorer 🦑 🧪
December 2, 2024 at 11:32 AM
A few critters from today's #reeflifesurvey in the GBR, including a coral lobster and a couple of colourful nudis. www.flickr.com/photos/johnw... #marineexplorer 🦑 🧪
December 1, 2024 at 9:50 PM
Day 1 of 3 weeks of #reeflifesurvey in the GBR and Coral Sea #marineexplorer
November 30, 2024 at 8:12 AM
Day 1 of 3 weeks of #reeflifesurvey in the GBR and Coral Sea #marineexplorer
Reef Life Survey training in Batemans Bay - 4 great days in the water, and 7 new RLSers certified... well done all!
November 28, 2023 at 7:24 PM
Reef Life Survey training in Batemans Bay - 4 great days in the water, and 7 new RLSers certified... well done all!