In general, jellyfish are an important indicator species for the health of the ocean. When they occur in great colonies, or blooms, it can signify increasing pollution, and an ecosystem that is out of balance.
On June 12, 2008, Hong Kong Post issued the special stamp set featured jelly fish species. The issue comprises of 6 postage stamps depicted each jelly species i.e: Flower hat jelly, Octopus jelly, Brown sea nettle, Moon jelly, Lion’s mane jelly, and Pacific sea nettle.
Flower Hat Jelly
The flower hat jelly (Olindias formosa) is a species of jellyfish occurring in the West Pacific off southern Japan. Flower hat jelly is one of the most 14 beautiful jellyfish in the world.
Flower hat jelly is one of a rare species of jellyfish. These invertebrate animals living in coastal waters. Characterized by lustrous tentacles that coil and adhere to its rim when not in use, the flower hat jelly's bell is translucent and pinstriped with opaque bands, making it easily recognizable.
The flower hat jelly can grow to be about 15 cm in diameter. Its sting is painful but non-lethal to humans. Its diet consists of mostly small fishes and some marine invertebrates.