Common name: Flower Urchin

General information

The Flower Urchin, scientifically known as Toxopneustes pileolus, is a striking and unique sea urchin species known for its vibrant coloration and flower-like appearance. The name 'Flower Urchin' comes from its numerous tube feet that resemble the petals of a flower. This species is notorious for its potent venom, which can cause severe pain and systemic reactions in humans.

Despite its dangerous nature, the Flower Urchin is sometimes kept by experienced aquarists who appreciate its beauty and are well-versed in handling venomous marine organisms. It is important to note that extreme caution should be exercised when keeping this species in a home aquarium.

Care

Flower Urchins require a specialized aquarium setup that mimics their natural habitat. They thrive in well-established tanks with plenty of live rock and a sandy substrate. Good water quality is essential, and they should be provided with a varied diet that includes algae and meaty foods.

Due to their venomous spines, they should not be housed with inquisitive fish or invertebrates that may attempt to interact with them. Additionally, aquarists must be careful during tank maintenance to avoid accidental stings.

Reproduction

In the wild, Flower Urchins reproduce by releasing gametes into the water column, a process known as broadcast spawning. In the aquarium, breeding is rare, but if conditions are optimal, they may spawn. The larvae are planktonic and go through several developmental stages before settling to the bottom and metamorphosing into juvenile urchins.

Symbiosis

Toxopneustes pileolus does not have any well-known symbiotic relationships that are relevant to the aquarium trade. However, in the wild, they may occasionally be used as a substrate by various small organisms seeking protection among their spines.

Habitat

The Flower Urchin is found in the Indo-Pacific region, from the Red Sea to the central Pacific. They inhabit coral reefs and rocky areas, typically at depths ranging from shallow waters to about 70 meters. Their natural environment is characterized by moderate to strong water currents, which they require for feeding and respiration.