Don't panic unless you want to of coarse, a fraction of a % of any species V area does not a disaster make, there will be casualties....probably less than a few trawlers bycatch over the same time period as it's worst, but it will amount to nothing of environmental consequence, good for a beat up though.
Personally I feel sorry for the birds, turtles, crabs and pipis, the even lower orders is where the mass killings are...all along the sand esp, it will all come back as good as new and fast too, it being summer is a help.
cheers fnq