Dr Crayfish
@drecrevisse.bsky.social
Crayfish researcher, biological illustrator, Arsenal and beer fan.
This is seriously impacting my ability to write my 🦞report😅
November 18, 2025 at 4:26 PM
This is seriously impacting my ability to write my 🦞report😅
Very rare bilateral colour mutation in a Rusty Crayfish from the Chagrin R. (photo by Sean Williams)
November 7, 2025 at 8:17 PM
Very rare bilateral colour mutation in a Rusty Crayfish from the Chagrin R. (photo by Sean Williams)
Got to 😍 this band! 🦞!
November 6, 2025 at 6:30 PM
Got to 😍 this band! 🦞!
Last monitoring for Marbled crayfish. Was cold and wet but we still did get some.
October 31, 2025 at 11:40 PM
Last monitoring for Marbled crayfish. Was cold and wet but we still did get some.
Trick or treat! Happy Halloween from dr🦞!
October 31, 2025 at 10:29 PM
Trick or treat! Happy Halloween from dr🦞!
She was eating my crayfish book and then fell asleep !?!🦞🦞📗🐈⬛
October 28, 2025 at 9:46 PM
She was eating my crayfish book and then fell asleep !?!🦞🦞📗🐈⬛
I am having a bit of trouble this morning working on my crayfish report…
October 24, 2025 at 3:17 PM
I am having a bit of trouble this morning working on my crayfish report…
Last sample of the season at one of my favourite spots. 10C and most adult crayfish have mostly disappeared from the stream.
October 11, 2025 at 1:05 PM
Last sample of the season at one of my favourite spots. 10C and most adult crayfish have mostly disappeared from the stream.
..and here it is in Ontario!😱
September 14, 2025 at 1:11 PM
..and here it is in Ontario!😱
Good news: The white morph of F. propinquus still surviving in Lake Simcoe despite the rusty crayfish invasion and spread.
But How long before it is extripated???!
But How long before it is extripated???!
August 26, 2025 at 4:27 PM
Good news: The white morph of F. propinquus still surviving in Lake Simcoe despite the rusty crayfish invasion and spread.
But How long before it is extripated???!
But How long before it is extripated???!
Two of my main concluding slides in my presentation:
August 22, 2025 at 1:21 PM
Two of my main concluding slides in my presentation:
Pleased to have delivered a seminar on invasive crayfish to the MNR Lake Ontario Management Unit at the historic Glenora research station.
August 22, 2025 at 1:20 PM
Pleased to have delivered a seminar on invasive crayfish to the MNR Lake Ontario Management Unit at the historic Glenora research station.
First record of the invasive Red Swamp crawfish (P. clarkii) in the Greater Toronto Area (in a large storm water pond). On iNaturalist; record and photos: DT Santhosh. This is the second recorded occurrence in Ontario and fourth in Canada. Red invasion is on!
August 14, 2025 at 9:02 PM
First record of the invasive Red Swamp crawfish (P. clarkii) in the Greater Toronto Area (in a large storm water pond). On iNaturalist; record and photos: DT Santhosh. This is the second recorded occurrence in Ontario and fourth in Canada. Red invasion is on!
Australian Crayfish family
August 14, 2025 at 5:02 PM
Australian Crayfish family
Leucistic Faxonius from VT
(photo: fishbruh @ inaturalist)
(photo: fishbruh @ inaturalist)
July 29, 2025 at 1:52 PM
Leucistic Faxonius from VT
(photo: fishbruh @ inaturalist)
(photo: fishbruh @ inaturalist)
Shoreline damage by invasive White River crayfish in Port Severn
July 20, 2025 at 5:42 PM
Shoreline damage by invasive White River crayfish in Port Severn
Pelleted excavate at the entrance of a C. bartoni ovigerous female's burrow deep in stream gravel.
July 19, 2025 at 3:23 PM
Pelleted excavate at the entrance of a C. bartoni ovigerous female's burrow deep in stream gravel.