Modifiers matching cnidarian:

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

Simple categories matching pelagic:

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