Modifiers matching polyp:

• small,
• sessile,
• benign,

Simple categories matching sessile:

• ciliate,
• form,
• organism,
• invertebrate,
• echinoderm,
• bivalve,
• shellfish,
• mollusc,
• protozoan,
• prey,
• taxon,
• benthos,
• animal,
• creature,
• fauna,
• coelenterate,
• polyp,
• cnidarian,
• resource,
• predator,