What I do with my finger mullet
Since finding them and catching them can be hit or miss, and when you do catch them, you seem to catch many, I like to put them in gallon sized, zip lock bags. I lay them flat and make one layer, seal the bag and freeze them. The flat bags stack nicely in the freezer, and the mullet thaw quicker than in a random pile. I will just toss a bag in the cooler when I head out, then let it sit out while I get set up. By that time they are ready to go.
Since finding them and catching them can be hit or miss, and when you do catch them, you seem to catch many, I like to put them in gallon sized, zip lock bags. I lay them flat and make one layer, seal the bag and freeze them. The flat bags stack nicely in the freezer, and the mullet thaw quicker than in a random pile. I will just toss a bag in the cooler when I head out, then let it sit out while I get set up. By that time they are ready to go.