Definition

1. Noun:
   • An aquatic invertebrate animal with a shell: A type of water-dwelling animal that lacks a backbone and typically has a hard outer shell for protection. This group primarily includes mollusks (like clams and oysters) and crustaceans (like crabs and lobsters).
   • The meat of such an animal used as food: The edible flesh harvested from these aquatic invertebrates.

Examples of Usage

• Noun (referring to the animal):
  • The tide pool was teeming with various shellfish, including mussels and small crabs.
  • People with allergies should avoid consuming shellfish.
• Noun (referring to the food):
  • The restaurant's specialty is fresh shellfish served with lemon butter.
  • We bought some shellfish from the market to make a paella.

Advanced Usage

• Collective noun: "Shellfish" is often used as a collective, uncountable noun when referring to them as a food group or category.
  • Shellfish is a good source of protein and minerals.
• Distinction from "fish": In culinary and biological contexts, "shellfish" is distinguished from finfish (like salmon or tuna), as they are biologically different types of animals.

Variants and Related Words

• Mollusk (n): A major subgroup of shellfish with soft bodies, often enclosed in a single or two-part shell (e.g., clams, oysters, snails).
• Crustacean (n): A major subgroup of shellfish with segmented bodies, jointed limbs, and a hard exoskeleton (e.g., crabs, lobsters, shrimp).
• Bivalve (n): A type of mollusk with a shell consisting of two hinged parts (e.g., clams, scallops, mussels).

Synonyms

• Seafood: (Broadly includes both shellfish and finfish.)
• Mollusks and crustaceans: (More specific biological terms for the two main categories.)

Related Phrases

• Shellfish allergy: A common and potentially severe allergic reaction to proteins in shellfish.
  • He carries an epinephrine injector due to his severe shellfish allergy.
• Shellfish harvesting: The activity of gathering shellfish from their natural habitat.
  • The bay is closed for shellfish harvesting due to red tide.

Noun

1. invertebrate having a soft unsegmented body usually enclosed in a shell
2. meat of edible aquatic invertebrate with a shell (especially a mollusk or crustacean)