Modifiers matching snail:

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

Simple categories matching venomous:

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