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I should have said it has only been recorded in Ireland in one small area of coastline in the south east.
Yes, it has to be this, and that's a great beetle website, which I've used for other IDs. I know most of the shore/saltmarsh beetles in England and used to share a lab with someone who studied an amazing saltmarsh rove beetle Bledius spectabilis which lives intertidally in a very cleverly designed burrow system.
Nick Upton, naturalist and photographer.
Yeah Roy Anderson has a great catalogue of beetle images there in that website Nick.
Sounds like a fascinating beetle, I wonder has it been recorded in Ireland before? I'd like to see that one. This one was a great surprise, I only went to that part of the coast to fish but the invertebrate life was superb and these beetles were out in force on the beach which was alive with sandhopper. One of the beetles was in such a frenzy of sandhopper that it was upside down, motionless and becoming buried in sand. I had to rescue it from its prey. The sandhopper were thick along the line of detritus left by the high water mark.
Your beetle sounds like a real specialist. I wonder why it's so localised... Bledius is very common in Norfolk where I used to do a lot of field work, but doesn't seem to be in Ireland at all.
Lat/Lng: 52.5272, -6.2207
OS grid ref: SG138005