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
A short set of clips from today's dive at Bare Island; testing lighting and camera settings. Lots of planktivores about... but 15 C water temp was a bit cool. 🦑 vimeo.com/1104838811
Bare Island July 2025
A short set of clips from today's dive; testing lighting and camera settings. Lots of planktivores about... but 15 C water temp was a bit cool
vimeo.com
July 27, 2025 at 4:34 AM
A short set of clips from today's dive at Bare Island; testing lighting and camera settings. Lots of planktivores about... but 15 C water temp was a bit cool. 🦑 vimeo.com/1104838811
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 🧪🦑
Highly protected, actively managed MPAs with evidence of monitoring and enforcement have more positive ecological outcomes.
Cell Reports Sustainability: Cell Reports Sustainability 🧪🦑 www.cell.com/cell-reports...
Cell Reports Sustainability: Cell Reports Sustainability 🧪🦑 www.cell.com/cell-reports...
Marine protected areas stage of establishment and level of protection are good predictors of their conservation outcomes
Global targets should track MPA quality and quantity. This is the first study using
a new science-based framework across 123 MPAs and tying levels of protection and stages
of establishment directly to...
www.cell.com
May 2, 2025 at 9:02 PM
Highly protected, actively managed MPAs with evidence of monitoring and enforcement have more positive ecological outcomes.
Cell Reports Sustainability: Cell Reports Sustainability 🧪🦑 www.cell.com/cell-reports...
Cell Reports Sustainability: Cell Reports Sustainability 🧪🦑 www.cell.com/cell-reports...
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 🦑 🧪
Can you see the animal? flic.kr/p/2qRYAN7 🦑
Can you see the animal?
Jervis Bay RLS
flic.kr
March 15, 2025 at 8:24 AM
Can you see the animal? flic.kr/p/2qRYAN7 🦑
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
Another #artwork attempt, this time stippling (pen dots... no solid lines) :) flic.kr/p/W8RwnH #shark #marineexplorer 🦑
Baby Port Jackson shark drawing
Heterodontus portusjacksoni
flic.kr
November 27, 2024 at 2:11 AM
Another #artwork attempt, this time stippling (pen dots... no solid lines) :) flic.kr/p/W8RwnH #shark #marineexplorer 🦑
Hairy anglerfish (Antennarius striatus) angling, yawning and walking 🦑 vimeo.com/660839395
Anglerfish antics.mp4
Watch as this young striate anglerfish (Antennarius striatus) goes fishing and generally turns on the charm for the camera.
vimeo.com
November 23, 2024 at 3:33 AM
Hairy anglerfish (Antennarius striatus) angling, yawning and walking 🦑 vimeo.com/660839395