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White Clawed Crayfish Survey

The white-clawed crayfish is the only native crayfish species in the UK. It is endangered and under threat from invasive crayfish species such as signal crayfish and the crayfish plague. Our simple to use eDNA test provides a cost-effective opportunity to monitor these species.

eDNA Survey Seasons

Optimal survey period =
Sub-optimal survey period =

White Clawed

Due to seasonal weather conditions and changes in crayfish activity over the year, sample collection is best suited to the summer months where crayfish activity levels are higher.

White Clawed icon


Developed In-house

Our crayfish eDNA service has been developed in house over a four-year period, working in collaboration with the University of Derby. Our white-clawed crayfish assay has been designed using the most sensitive sample collection technique and has been validated in a wide range of environments including ponds, streams, rivers and lakes to determine the most appropriate sample collection period for reliable species detection.

Buy Your Kit

Our kit has been specially designed and optimised to obtain the maximum amount of DNA from a water sample possible. By using filters, we can collect DNA from volumes up to 1L (over 10x the amount collected using the ethanol filled tubes for GCN eDNA).

Only one eDNA Filtration Kit is needed per site, to detect up to four different target species. Mix and match to analyse multiple species such as: white-clawed crayfish, signal crayfish, marbled crayfish, crayfish plague, smooth newt, asian clam… Basically any four species from our other species detectable by eDNA page here.

eDNA Collection Kit: £25.00 ex. VAT

Buy Your Kit
Buy Your Kit

Prices & Turnaround Times

When returning your kit, please indicate on the sample collection form which species you wish to analyse the sample for.

  • Analysis of 1 target species – £140.00
  • Analysis of 2 target species – £170.00
  • Analysis of 3 target species – £200.00
  • Analysis of 4 target species – £230.00

Popular Target species:

  • White-clawed crayfish  Austropotamobius pallipes
  • Signal crayfish               Pacifastacus leniusculus
  • Marbled crayfish           Procambarus virginalis
  • Crayfish plague             Aphanomyces astaci

Or any four species from our other species detectable by eDNA page here. Turnaround times are up to 10 working days from receiving the sample at the laboratory. All prices ex. VAT.

Prices & Turnaround Times

Returning Your Kit for Analysis

We recommend returning kits by courier with APC, they have depots across the UK and the most convenient drop-off spot may be found here. We also accept hand-delivered kits Mon-Thurs 8am-4.30pm and Fri 8am-4pm, and by appointment 24/7.

Alternatively, please post your samples to:

SureScreen Scientifics
Morley Retreat
Church Lane, Morley


Crayfish FAQs

How many samples do I need to collect?

Can you analyse for all four species from one sample?

Is the test specific to the species?

What about biosecurity?

Who can sample?

Are there any other laboratories that can analyse for the presence of White clawed crayfish?

Can this analysis prove the absence of crayfish for building development?

Is this method approved by Natural England or the Environment Agency?

How accurate is the eDNA analysis for Crayfish?

When is the best time to sample?

What volume of water do I need to filter?

Pond Sample Collection

Stream and River Sample Collection

What are the chances of detecting old/no longer present populations of crayfish?

Is eDNA for Crayfish more sensitive at detecting presence of Crayfish than traditional methods?