How many tons of lugworms?

Loch Indaal is absolutely brilliant for birdwatching, which means of course that it is absolutely brilliant for birds. Whiich means it must be brilliant for the things that birds eat. The current low tides give us the opportunity to see just how fertile the top of the loch is. Doubtless someone has worked out how many millions of lugworms are out there by counting the casts, and then extrapolating from that to work out the tonnage of wormage. It must be a lot.
Carl