Jellyfish are a plentiful creature in the oceans of the Ecco universe, and a common enemy in multiple environments. They are often found together in large schools which makes them troublesome. Jellyfish have been shown to live in a number of water types.

Jellyfish typically use their tentacles to propel themselves towards the surface and disappear off the screen. Jellyfish are passive enemies, but they deal damage on contact. Jellyfish are not edible and can not be eaten by Ecco. They can be defeated with Ecco's charge attack, the Charge Sonar, or the Death Sonar.

Ecco the Dolphin

Normal Jellyfish

Common Jellyfish are widespread throughout the Ecco seas, occuring in all the original games. It is the simple jellyfish, dealing low damage and swimming up to the surface. It is called the Membrane Jellyfish in Ecco: Defender of the Future, where it phases in and out of visibility, making it hard to see.

Prehistoric Jellyfish

The Prehistoric Jellyfish occurs in the prehistoric levels of Ecco the Dolphin.

Prehistoric jellyfish

Prehistoric jellyfish.

Ancient Jellyfish

A single Ancient Jellyfish is found in Trilobite Circle in Ecco the Dolphin. It is likely a leftover prototype from before the Prehistoric Jellyfish was added.

Arctic Jellyfish

Tides of Time

Normal Jellyfish

Common Jellyfish are also found in Ecco: The Tides of Time.


The Medusa is a large jellyfish in Ecco: The Tides of Time. This large red creature chases Ecco through The Tube and cannot be defeated.

Defender of the Future

Moon Jellyfish

Moon Jellyfish are almost invisible jellyfish found in many levels such as Perils of the Coral Reef.

Box Jellyfish

Box Jellyfish are a toxic jellyfish in Ecco: Defender of the Future, which can poison or kill Ecco. To cure the sting a stone-coloured Schooling Fish must be consumed.

Blue Jellyfish

This large jellyfish occurs in Ecco: Defender of the Future. It is a damaging species, but is not as transparent and can be seen further away.


This lethal jellyfish appears in Ecco: Defender of the Future and poisons on contact. The only way to cure the sting is to eat a special fish that hurts Ecco but heals the poison. This jellyfish can be defeated like normal jellyfish, with a charge or sonar to its dome.

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