Modifiers matching larva:

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

Simple categories matching bivalve:

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