Modifiers matching gastropod:

• terrestrial,
• common,
• smaller,
• marine,
• small,
• large,
• intertidal,
• herbivorous,

Simple categories matching intertidal:

• invertebrate,
• bivalve,
• fauna,
• species,
• organism,
• prey,
• herbivore,
• animal,
• shellfish,
• mollusk,
• system,
• gastropod,
• structure,
• mollusc,
• creature,
• snail,
• arthropod,