Modifiers matching coelenterate:

• sessile,

Simple categories matching sessile:

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