Modifiers matching snail:

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

Simple categories matching venomous:

• beast,
• invertebrate,
• snail,
• snake,
• animal,
• creature,
• fish,
• spider,
• critter,
• serpent,
• organism,
• thing,
• insect,
• reptile,
• arthropod,
• pet,
• scorpion,