Flower Hat Jelly

Olindias formosus

Its bell is crowned with curled tentacles tipped in neon pink and yellow-green. Rarely seen in the wild and very hard to keep.

A peaceful saltwater jellyfish that grows to 15 cm, lives all over the tank and needs 15–22 °C, pH 7.9–8.4 and an aquarium of at least 120 L.

Care at a glance

Water

Saltwater

Temperature

15–22 °C (59–72 °F)

pH

7.9–8.4

Adult size

15 cm (5.9 in)

Aquarium

120 L or bigger (32 US gal)

Temperament

Peaceful

Group size

Fine on its own

Swims

All levels

Diet

Carnivore

Wild home

Coastal waters off southern Japan & Brazil

Good to know

• Delicate. Sensitive to poor water quality.
• Bioluminescent. Glows in the dark.

Tank mates

Good company: Aurora Moon Jelly, Leafy Seadragon, Peppermint Angelfish.

Harassed by: Clown Triggerfish, Golden Dwarf Moray, Lantern Anglerfish, Lionfish, Psychedelic Frogfish, Snowflake Moray.

Colours

• Classic mythic

The care values are the ones Aquarius uses, based on how these animals live. Tank mates follow the game's rules: water type, temperature and pH, who can swallow whom, fin nipping, temperament and territory.