
Flambuoyant
This is a juvenile Flambuoyant Cuttlefish - Metasepia pfefferi.
Cuttlefishes are not real fishes but cephalopod.
The Flambuoyant Cuttlefish is probably the most beautiful/colourful cuttlefish.
Not only are they able to change their colours, but also can change part of the shape of their body and when they are moving, they 'flash' their colours constantly, with the flashing moving from the head to the tail of the body.
The tentacles are of flashy colour of purple and yellow, making it looks like a flower.
Their colours indicates they are poisonous, with their flesh containing unique acids which is poisonous for consumption.
They can grow up to 8 cm in size and this one is just a juvenile, around 2 cm in size.

Ascarosepion pfefferi is a species of cuttlefish occurring in tropical Indo-Pacific waters off northern Australia, southern New Guinea, as well as numerous islands of the Philippines, Indonesia and Malaysia. The flesh of this colorful cephalopod contains unique acids, making it unsuitable for consumption.