Modifiers matching larva:

• invertebrate,
• mobile,
• unwanted,
• useful,
• small,
• pelagic,
• bivalve,
• sized,
• bodied,
• crustacean,
• marine,
• aquatic,
• large,

Simple categories matching bivalve:

• mollusk,
• organism,
• seafood,
• mollusc,
• shellfish,
• larva,
• species,
• predator,