Blue Blubber (Catostylus mosaicas)


Blue blubbers are probably the most common jellyfish to be seen in the aquarium trade because they are sometimes imported with fish shipments from the Philippines. They are very energetic swimmers and require a lot of food or they will slowly shrink. They are found in an amazing range of colours including blue, black, dark red, white and green. This variation and their energy make them very popular pet jellyfish.

The reproduction method is yet to be known. There a lot of colour variations of this species including colours from white to dark blue and purple to brown. Very popular species because of the way they swim and the variation of the colour. Their sting is designed to catch small planktonic organisms so it isn’t vary powerful but it can still bring some people out in a rash or welts particularly if  you touch the jelly then touch sensitive parts of your body like your eyes.

Species Information

  • Harmful to humans: No
  • Distribution: South East Asia
  • Maximum Bell Size: 10 cm (4 inches)
  • Life Span: 1 year
  • Feeding: Freshly hatched baby brine shrimp, coral reef food
  • Temperature: 24 – 28°C (75 – 82°F)
  • Photosynthetic: No
  • Care level: Medium
  • Notes:  Blue blubbers were thought to have symbiotic algae inside their body, however, recent research showed that either they do not have symbiotic algae or the contribution of photosynthesis of their symbiotic algae is negligible. They are very active swimmer and require a lot of food to maintain their energy consumption. The DO level needs to be kept high to support their active swimming in captivity.

Status: In Stock