Jellyfish in our Coastal Seas
This publication examines the different types of jellyfish which can be found in Irish waters. The life-cycle of the jellyfish, their habitats, jellyfish as food for other marine animals, and their impacts on humans is also outlined.Read MoreRead Less
Ireland has five indigenous jellyfish species: Barrel, Blue, Common (Moon), Compass, and Lion’s Mane. A sixth species (Pelagia noctiluca) also occurs, but as it is an oceanic species it only occasionally makes an appearance in our coastal waters. Contrary to what you may think, jellyfish are not carried at the whim of ocean currents and tides on to our beaches. Many jellyfish maintain their positions by swimming down when the tide is going out, and swimming up when the tide is coming in. In this way they can stay in their preferred habitats.
- Published by: The Heritage Council