Tapioca starch doesn't stick to the squid as well as traditional batters. While you can't tell from eating the finished product, there will be a lot of tapioca crumbs in your deep-fryer when you're done. Filter them out by pouring your fat though a paper towel-lined sieve. Deep-frying seafood can leave a slightly fish flavor to your fat. Use separate fat fo deep-fry seafood versus vegetables.