Thread herring have a dark blue-gray back, silvery sides, a white belly and a small head. It grows up to 15 in length, but the average fish is 6 -8. It has a very long thread-like fin at the back of its dorsal that accounts for its name. (Often confused with the pilchard or scaled sardine) **This Product is exclusively for IN-STORE PICK UP and LOCAL PICK UP ONLY!