Understanding Shellfish: Prawns, Crabs, and Mussels Explained

Shellfish encompasses a wide range of creatures, each with different characteristics, flavours, and cooking requirements. Understanding what you're buying helps you prepare it properly and appreciate what makes each type special.

Prawns and Shrimp

Prawns are larger than shrimp and have more flavour. UK prawns are often caught sustainably and are sweeter than imported varieties. When buying, look for firm flesh and a fresh sea smell. Raw prawns should be grey or translucent; pink means they're cooked. Store on ice and use within a day. They cook in just 2-3 minutes—overcooking makes them tough and rubbery.

Crabs: Brown and Spider

Brown crabs are the classic UK crab, sweet and meaty. The brown meat from the body is rich; the white meat from the claws is delicate. Spider crabs have longer legs and sweeter meat. Choose crabs that feel heavy for their size and smell fresh. Live crabs should move actively. Cooked crab keeps for several days in the fridge.

Lobsters: A Special Treat

Native UK lobsters are spiny and less expensive than their clawed cousins. The meat is sweet and tender. Live lobsters should be lively; cooked ones should smell fresh. They're best simply prepared—boiled or grilled—to showcase their natural flavour. A 500g lobster takes about 15 minutes to boil.

Mussels: The Affordable Option

Mussels are nutritious, sustainable, and inexpensive. They should be tightly closed when raw; discard any that won't close when tapped. Rinse them well and remove the beard (the stringy bit). They cook in just 3-5 minutes in a covered pan with a little liquid. Most will open; discard any that don't.

Scallops: The Premium Choice

Hand-dived scallops from UK waters are a luxury item. Buy them as fresh as possible. Dry scallops (without added water) are superior to wet ones. They need minimal cooking—just 90 seconds per side in a hot pan gives a perfect golden crust and tender centre.

Oysters: Raw or Cooked

Oysters are best eaten raw, freshly shucked. They should smell like the sea and be plump in their liquid. If cooking, keep it brief—just a few minutes in the shell over heat until they open.

Storage and Safety

Shellfish are highly perishable. Store all shellfish on ice in the coldest part of your fridge. Use live shellfish within a day of purchase. Cooked shellfish keeps for 2-3 days. Never eat shellfish that smells off or doesn't open when cooked.

Quick Cooking Methods

Most shellfish cooks quickly and simply: boiling, steaming, grilling, or pan-frying. Avoid overcooking, which toughens the meat and ruins the delicate flavour. A squeeze of lemon is often all the seasoning needed.

Each shellfish has unique qualities worth exploring. Building familiarity with different types expands your cooking repertoire and keeps meals interesting.