Sea dread

Sea creature

Deep sea

Sea monster

Sea beast

Aquatic beast

Aquatic monster

Deep dread

Deep sea dread

Sharp teeth

Monstrous creature

Ocean depths

Deep dive

Fantasy fish

Terrifying creature

Underwater beast

Marine monster

Ancient predator

Underwater horror

Marine beast

Sense of fear

Underwater menace

Marine menace

Mutant menace

Terror of sea

Fish fiend