Shucking Soft Shell Clams (Steamers) 1. Slide a knife along the underside of the clam’s top shell. Bend back and detach the top shell. 2. Slide a knife under the clam, along the bottom shell, and detach the clam. 3. Pull the dark leathery membrane away from the clam’s siphon. Thanks to James Peterson for these instructions from his book “Fish & Shellfish”.