Jellicent is a large jellyfish-like Pokémon whose appearance varies based on gender. Both genders have five tentacles, two of which are long with petal-shaped ends. The remaining three are short and tapered. A male is blue with a short, white crown, and a white, mustache-like collar. Its eyes are red with blue sclerae, and there is one eyelash over each eye. Its long tentacles have white edges, while its short tentacles have white spots. A female is pink with a tall, white crown and a puffy, white collar. Its eyes are blue with red sclerae and surrounded by two eyelashes. Its mouth is red and heart-shaped. The long tentacles have white edges like the male, but the short ones have white frills.
Jellicent can absorb seawater and project it from its head, which lets it move forward in the sea. Jellicent's body composition is similar to seawater. Schools of Jellicent are known to gather for prey during a full moon. Any fancy cruise ships, tankers, or crew that wander into the oceans where it dwells are never found again, and it is rumored that it drags these ships or tankers into the sea and preys on its passengers. It can create lairs from sunken ships. It is known to feed on life energy, where the more it drains, the bigger its crown gets. Jellicent are highly feared by fishers.
Frillish and Jellicent were originally pure Water-type. The Ghost type was added to their typing for balancing reasons, with Ken Sugimori noting that the designer for the Frillish line was disappointed that they ended up becoming scary Pokémon.
