Modifiers matching snail:

• predatory,
• aquatic,
• marine,
• large,
• herbivorous,
• terrestrial,
• small,
• intertidal,
• larger,
• venomous,

Simple categories matching intertidal:

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