The float of the bluebottle can be up to 30 cm and the tentacles up to 50 m.
The floating part of the bluebottle – the bladder – is blue and has dangling tentacles below. Some are flat without the distinctive bladder.
Bluebottles General Info
Bluebottles belong to the Physaliidae family which is a part of the Siphonophora order. It comprises of four distinct individuals – the float, tentacles, organs and sexual organs. They catch their prey with their stinging cells which have nematocyst. They reproduce sexually by releasing their eggs and sperm into the water.
Bluebottles feed on fish, fish larvae and cephalopods.
They can be found in tropical and temperate oceans across the world.
Blue button - Porpita porpita
Bluebottle - Physalia physalis
By the wind sailor - Velella sp.
© Johan Boshoff