Crab care question

Pickt up three commies from HMB docks around noon. Just made it home and their sutting in my sink. If i intend to cook them for dinnr around 1800 what shd i do to optimize food value until spa time?  No aerator or tank availble.

Thx

Just cook 'em now.

-Allen

Put them in a paper bag and stick em in the fridge, they'll be fine.