The hypogean (subterranean) Crustacea recording scheme is a small scheme dealing with the subterranean macro-Crustacea found in the groundwater and aquatic cave habitats of the British Isles, including Ireland. The scheme only encompasses the larger Crustacea specifically evolved to exist in underground aquatic habitats (stygobites).
How to get involved
Sampling methodologies: http://hcrs.freshwaterlife.org/sampling