Luminescent Jellyfish (Pelagia Noctiluca)
Latin name: Pelagia noctiluca
Common name: Luminescent Jellyfish
Distribution: Mediterranean, Atlantic.
Habitat: Mainly open waters, but also coastal.
Behaviour: They are often accompanied by juvenile jacks who seek protection, but are not immune.
Reproduction: This species has no sessile stage in its reproduction, with the adult releasing juvenile medusae in the autumn.
Size: Bell around 10cm, marginal tentacles can extend more than 1 metre.
Shape: The spots on the bell are actually warts armed with stinging cells. It has 16 lobes, 8 sense organs, 8 marginal tentacles and 4 shorter frilled mouth tentacles.
Colour: They are strongly luminescent, but this is visible only at night and when disturbed.