Modifiers matching cnidarian:

• small,
• oceanic,
• colonial,
• marine,
• sessile,
• simple,
• pelagic,
• predatory,

Simple categories matching pelagic:

• bird,
• mammal,
• animal,
• plankton,
• fish,
• ray,
• fauna,
• family,
• crustacean,
• seabird,
• organism,
• invertebrate,
• shark,
• predator,
• food,
• tuna,
• process,
• action,
• species,
• larva,
• fossil,
• cephalopod,
• cnidarian,
• vertebrate,
• fisher,
• prey,