Seahorse Sleuth is a website that enables users to identify seahorse species using DNA sequences. It is an expansion of an approach that has already been implemented for whales and dolphins: see Witness for the Whales.

Seahorse Sleuth compares a DNA sequence submitted by the user with a set of reference sequences from vouchered seahorse specimens. Seahorse Sleuth is implemented within DNA Surveillance, a computer system developed at the University of Auckland which applies standard comparative methods to identify the affinity of the DNA sequences that you submit.