Colin Simpfendorfer
@sharkcolin.bsky.social
Shark scientist since 1986. Passionate about sharks and rays, and their conservation and management. Lapsed academic.
Happy #internationalsawfishday to all who celebrate.
October 17, 2025 at 1:08 PM
Happy #internationalsawfishday to all who celebrate.
New #sharkscience
Do differences in mitogenome patterns between sexes indicate female philopatry in sharks? Laso-Jadart et al tested this in white sharks and the answer is no. Significant implications for determining philopatry in sharks. @iucnshark.bsky.social
doi.org/10.1073/pnas...
Do differences in mitogenome patterns between sexes indicate female philopatry in sharks? Laso-Jadart et al tested this in white sharks and the answer is no. Significant implications for determining philopatry in sharks. @iucnshark.bsky.social
doi.org/10.1073/pnas...
August 7, 2025 at 6:48 AM
New #sharkscience
Do differences in mitogenome patterns between sexes indicate female philopatry in sharks? Laso-Jadart et al tested this in white sharks and the answer is no. Significant implications for determining philopatry in sharks. @iucnshark.bsky.social
doi.org/10.1073/pnas...
Do differences in mitogenome patterns between sexes indicate female philopatry in sharks? Laso-Jadart et al tested this in white sharks and the answer is no. Significant implications for determining philopatry in sharks. @iucnshark.bsky.social
doi.org/10.1073/pnas...
Elasmo #dreamjob. Join the lineage of great elasmobranch researchers who have filled this position at CSULB. Review of applications starts early September...
#sharkscience @iucnshark.bsky.social
csucareers.calstate.edu/en-us/job/54...
#sharkscience @iucnshark.bsky.social
csucareers.calstate.edu/en-us/job/54...
June 25, 2025 at 9:56 PM
Elasmo #dreamjob. Join the lineage of great elasmobranch researchers who have filled this position at CSULB. Review of applications starts early September...
#sharkscience @iucnshark.bsky.social
csucareers.calstate.edu/en-us/job/54...
#sharkscience @iucnshark.bsky.social
csucareers.calstate.edu/en-us/job/54...
Next week is the Oceania Chondrichthyan Society 20th Anniversary conference. Looks like an amazing slate of talks and posters. What a better way to spend a week than talking sharks and rays. Excited to hear about all the great research happening.
Schedule:
drive.google.com/file/d/1pcex...
Schedule:
drive.google.com/file/d/1pcex...
June 12, 2025 at 7:51 PM
Next week is the Oceania Chondrichthyan Society 20th Anniversary conference. Looks like an amazing slate of talks and posters. What a better way to spend a week than talking sharks and rays. Excited to hear about all the great research happening.
Schedule:
drive.google.com/file/d/1pcex...
Schedule:
drive.google.com/file/d/1pcex...
New #sharkscience from Natascha Wosnick and co.
Urbanization around lemon shark nurseries leads to measurable changes in physiological indicators of health. indicators.
doi.org/10.1016/j.ma...
@iucnshark.bsky.social
Urbanization around lemon shark nurseries leads to measurable changes in physiological indicators of health. indicators.
doi.org/10.1016/j.ma...
@iucnshark.bsky.social
June 12, 2025 at 7:40 PM
New #sharkscience from Natascha Wosnick and co.
Urbanization around lemon shark nurseries leads to measurable changes in physiological indicators of health. indicators.
doi.org/10.1016/j.ma...
@iucnshark.bsky.social
Urbanization around lemon shark nurseries leads to measurable changes in physiological indicators of health. indicators.
doi.org/10.1016/j.ma...
@iucnshark.bsky.social
New #sharkscience led by Jorge Valerio-Vargas in @esr-ir.bsky.social
Using #eDNA to find remnant sawfish populations in Costa Rica to aid in prioritizing conservation efforts.
@saveourseas.bsky.social @iucnshark.bsky.social
www.int-res.com/abstracts/es...
Using #eDNA to find remnant sawfish populations in Costa Rica to aid in prioritizing conservation efforts.
@saveourseas.bsky.social @iucnshark.bsky.social
www.int-res.com/abstracts/es...
June 6, 2025 at 4:32 AM
New #sharkscience led by Jorge Valerio-Vargas in @esr-ir.bsky.social
Using #eDNA to find remnant sawfish populations in Costa Rica to aid in prioritizing conservation efforts.
@saveourseas.bsky.social @iucnshark.bsky.social
www.int-res.com/abstracts/es...
Using #eDNA to find remnant sawfish populations in Costa Rica to aid in prioritizing conservation efforts.
@saveourseas.bsky.social @iucnshark.bsky.social
www.int-res.com/abstracts/es...
It is a beautiful day to kick off day 2 of #oosc2025. Starting the day with green listing town hall, then a plenary or two, and some deep sea science. #oceanconsetvation #nice
June 4, 2025 at 6:49 AM
It is a beautiful day to kick off day 2 of #oosc2025. Starting the day with green listing town hall, then a plenary or two, and some deep sea science. #oceanconsetvation #nice
@michelleheupel.bsky.social from @imos-aus.bsky.social talking about the value of ocean observations for all aspects of human societies. Ocean data is fundamental to many parts of our lives and we rarely recognise it. #oosc2025
June 3, 2025 at 11:20 AM
@michelleheupel.bsky.social from @imos-aus.bsky.social talking about the value of ocean observations for all aspects of human societies. Ocean data is fundamental to many parts of our lives and we rarely recognise it. #oosc2025
New #sharkscience from Cornelia Erk & stellar cast of ghost shark researchers.
Genetic diversity of American elephantfish showing "recent" arrival in South America. And as a bonus, relationship between the 3 Callorhinchus spp
doi.org/10.1111/jfb....
@britfinucci.bsky.social @iucnshark.bsky.social
Genetic diversity of American elephantfish showing "recent" arrival in South America. And as a bonus, relationship between the 3 Callorhinchus spp
doi.org/10.1111/jfb....
@britfinucci.bsky.social @iucnshark.bsky.social
May 19, 2025 at 10:24 PM
New #sharkscience from Cornelia Erk & stellar cast of ghost shark researchers.
Genetic diversity of American elephantfish showing "recent" arrival in South America. And as a bonus, relationship between the 3 Callorhinchus spp
doi.org/10.1111/jfb....
@britfinucci.bsky.social @iucnshark.bsky.social
Genetic diversity of American elephantfish showing "recent" arrival in South America. And as a bonus, relationship between the 3 Callorhinchus spp
doi.org/10.1111/jfb....
@britfinucci.bsky.social @iucnshark.bsky.social
On day 2 of our bowmouth guitarfish workshop we were lucky to visit with the individuals in the Singapore Oceanarium, including this pregnant female. #sharkscience
May 13, 2025 at 5:18 AM
On day 2 of our bowmouth guitarfish workshop we were lucky to visit with the individuals in the Singapore Oceanarium, including this pregnant female. #sharkscience
And thanks to @neilonshore.bsky.social from @jcuofficial.bsky.social for sharing a picture of my closest encounter with a bowmouth guitarfish here in Singapore at the Oceanarium back in 2019
May 12, 2025 at 1:41 AM
And thanks to @neilonshore.bsky.social from @jcuofficial.bsky.social for sharing a picture of my closest encounter with a bowmouth guitarfish here in Singapore at the Oceanarium back in 2019
Great to be in Singapore to talk bowmouth guitarfish science and conservation. #rhinorays #sharkscience #sharkscience
May 12, 2025 at 1:10 AM
Great to be in Singapore to talk bowmouth guitarfish science and conservation. #rhinorays #sharkscience #sharkscience
Started working on my talk for this years 20th Anniversary Oceania Chondrichthyan Society meeting. It contains a section on history of shark research in Australia, and it has been a bit of a wild trip down memory lane. This photo from Sharks Down Under in 1991 was from my first ever conference.
April 24, 2025 at 3:28 AM
Started working on my talk for this years 20th Anniversary Oceania Chondrichthyan Society meeting. It contains a section on history of shark research in Australia, and it has been a bit of a wild trip down memory lane. This photo from Sharks Down Under in 1991 was from my first ever conference.
100% agree with Alec - skates should not get a special shout out
April 3, 2025 at 9:28 PM
100% agree with Alec - skates should not get a special shout out
Yes I'm religious, I believe in the holy trinity...
April 2, 2025 at 9:01 PM
Yes I'm religious, I believe in the holy trinity...
You can find the paper online:
archive.org/download/bio...
Cressey RF, Simpfendorfer CA. 1988. Pseudopandarus australis, a new species of pandarid copepod from Australian sharks. Proceedings of the Biological Society of Washington, 101(2):340-345.
Male pictured below
archive.org/download/bio...
Cressey RF, Simpfendorfer CA. 1988. Pseudopandarus australis, a new species of pandarid copepod from Australian sharks. Proceedings of the Biological Society of Washington, 101(2):340-345.
Male pictured below
April 1, 2025 at 8:46 PM
You can find the paper online:
archive.org/download/bio...
Cressey RF, Simpfendorfer CA. 1988. Pseudopandarus australis, a new species of pandarid copepod from Australian sharks. Proceedings of the Biological Society of Washington, 101(2):340-345.
Male pictured below
archive.org/download/bio...
Cressey RF, Simpfendorfer CA. 1988. Pseudopandarus australis, a new species of pandarid copepod from Australian sharks. Proceedings of the Biological Society of Washington, 101(2):340-345.
Male pictured below
Inspired by @fishguy.bsky.social 's #MyFirstPaper post I thought I would do the same.
In 1988, working with Roger Cressey from the Smithsonian, we described the beast pictured below - Pseudopandarus australis - a copepod parasite on requiem and hammerhead sharks of eastern Australia. /1
In 1988, working with Roger Cressey from the Smithsonian, we described the beast pictured below - Pseudopandarus australis - a copepod parasite on requiem and hammerhead sharks of eastern Australia. /1
April 1, 2025 at 8:41 PM
Inspired by @fishguy.bsky.social 's #MyFirstPaper post I thought I would do the same.
In 1988, working with Roger Cressey from the Smithsonian, we described the beast pictured below - Pseudopandarus australis - a copepod parasite on requiem and hammerhead sharks of eastern Australia. /1
In 1988, working with Roger Cressey from the Smithsonian, we described the beast pictured below - Pseudopandarus australis - a copepod parasite on requiem and hammerhead sharks of eastern Australia. /1
New #sharkscience from Alex McInturf, @physiologyfish.bsky.social and others.
Can you use catch data to provide information on aggregation and group behaviour in sharks? Yes you can. Thoughtful article with a nice case study on the amazing blacktip reef shark
onlinelibrary.wiley.com/doi/10.1002/...
Can you use catch data to provide information on aggregation and group behaviour in sharks? Yes you can. Thoughtful article with a nice case study on the amazing blacktip reef shark
onlinelibrary.wiley.com/doi/10.1002/...
March 31, 2025 at 9:51 PM
New #sharkscience from Alex McInturf, @physiologyfish.bsky.social and others.
Can you use catch data to provide information on aggregation and group behaviour in sharks? Yes you can. Thoughtful article with a nice case study on the amazing blacktip reef shark
onlinelibrary.wiley.com/doi/10.1002/...
Can you use catch data to provide information on aggregation and group behaviour in sharks? Yes you can. Thoughtful article with a nice case study on the amazing blacktip reef shark
onlinelibrary.wiley.com/doi/10.1002/...
New #sharkscience from Carlo Cattano et al.
Predatory teleosts shadow sandbar sharks to enhance predation opportunities.
#yawnshark
@ecologicalsociety.bsky.social
@iucnshark.bsky.social
esajournals.onlinelibrary.wiley.com/doi/10.1002/...
Predatory teleosts shadow sandbar sharks to enhance predation opportunities.
#yawnshark
@ecologicalsociety.bsky.social
@iucnshark.bsky.social
esajournals.onlinelibrary.wiley.com/doi/10.1002/...
March 30, 2025 at 9:04 PM
New #sharkscience from Carlo Cattano et al.
Predatory teleosts shadow sandbar sharks to enhance predation opportunities.
#yawnshark
@ecologicalsociety.bsky.social
@iucnshark.bsky.social
esajournals.onlinelibrary.wiley.com/doi/10.1002/...
Predatory teleosts shadow sandbar sharks to enhance predation opportunities.
#yawnshark
@ecologicalsociety.bsky.social
@iucnshark.bsky.social
esajournals.onlinelibrary.wiley.com/doi/10.1002/...
And while the headline is about the EU, there is a lot more information in this paper. That includes a map comparing the trade routes for shark meat and shark fins, which are very different. The shark meat trade routes are much more complex and diverse.
March 30, 2025 at 4:12 AM
And while the headline is about the EU, there is a lot more information in this paper. That includes a map comparing the trade routes for shark meat and shark fins, which are very different. The shark meat trade routes are much more complex and diverse.
The first paper uses vertebral isotope profiles that track the movements of individuals, while the second uses genomics that tracks generations of individuals. Both can be somewhat correct, it is all about the interpretation of time frames data represent. @underwater-teah.bsky.social
March 3, 2025 at 5:23 AM
The first paper uses vertebral isotope profiles that track the movements of individuals, while the second uses genomics that tracks generations of individuals. Both can be somewhat correct, it is all about the interpretation of time frames data represent. @underwater-teah.bsky.social
Science is full of what sound like contradictions. Great example this week with tow papers on the structure of Australian the white shark. Population:
One supports two populations: www.publish.csiro.au/WR/WR24132
The other supports one population:
onlinelibrary.wiley.com/doi/10.1111/...
One supports two populations: www.publish.csiro.au/WR/WR24132
The other supports one population:
onlinelibrary.wiley.com/doi/10.1111/...
March 3, 2025 at 5:17 AM
Science is full of what sound like contradictions. Great example this week with tow papers on the structure of Australian the white shark. Population:
One supports two populations: www.publish.csiro.au/WR/WR24132
The other supports one population:
onlinelibrary.wiley.com/doi/10.1111/...
One supports two populations: www.publish.csiro.au/WR/WR24132
The other supports one population:
onlinelibrary.wiley.com/doi/10.1111/...
Welcome to the new wave of followers and thanks for pushing me past the 2K mark. I'm a marine biologist who specialises in shark and ray science and conservation. Here is a picture of a bull shark (and a bunch of friends in the background) in Fiji to celebrate the milestone.
January 21, 2025 at 1:54 AM
Welcome to the new wave of followers and thanks for pushing me past the 2K mark. I'm a marine biologist who specialises in shark and ray science and conservation. Here is a picture of a bull shark (and a bunch of friends in the background) in Fiji to celebrate the milestone.
If you see this post a stingray
January 17, 2025 at 9:16 PM
If you see this post a stingray
and as a bonus number 6 would be coconut crab (Niue)
January 6, 2025 at 12:06 AM
and as a bonus number 6 would be coconut crab (Niue)