Black Sea Nettle (Chrysaora achlyos)


The black sea nettle (Chrysaora achlyos), sometimes informally known as the Black jellyfish or Sarlacc Jellyfish, is a species of jellyfish that can be found in the waters of the Pacific Ocean. This species is a relatively new species which they are only described first time in 1997 from Eastern Pacific. Its range is thought to be from Monterey Bay in the north, down to southern Baja California and Mexico, though there are reports of sightings as far north as British Columbia. They have tint of purple colour when they are small. Then their bells became creamy pink colour and start to develop bright red colouration on their oral arms after they grew to approx 5cm. In the wild, the adult black sea nettles are found dark red colour througout their whole body.

Species Information

  • Harmful to humans: Partially - Stings from captive bred species are usually undetectable, however may cause irritation to those with sensitive skin
  • Distribution: Pacific Ocean, North of Monterey Bay, down to southern Baja California, and Mexico  
  • Maximum Bell Size: 80 cm (32 inches)
  • Life Span: 2-3 years is captivety
  • Feeding: small fish and crustacean, freshly hatched baby brine shrimp, adult brine shrimp, mysids, sea food shake, moon jellyfish, comb jellyfish
  • Temperature: 15 – 24°C (59 – 75.2°F)
  • Photosynthetic: No
  • Care level: Medium
  • Notes: This species grow slowly when they are at ephyrae stage. They are not good at catching baby brine shrimp. Once they started to feed chopped up moon jellyfish, they grow very fast.