Common name: White and orange edge flatworm

General information

Hancock's Flatworm, scientifically known as Pseudoceros hancockanus, is a vibrant and colorful species of polyclad flatworm. These flatworms are known for their striking patterns and hues, which can range from bright blues and greens to yellows and pinks, often with intricate, contrasting lines and spots. They are a popular subject for underwater photographers and are becoming increasingly appreciated in the reefkeeping community for their unique appearance.

Care

Caring for Hancock's Flatworm in a reef aquarium requires attention to water quality and tank mates. They are sensitive to high levels of nitrates and phosphates, so maintaining pristine water conditions is crucial. They are not aggressive and can be kept with a variety of reef-safe fish and invertebrates. However, it's important to note that some fish may prey on flatworms, so tank mates should be chosen carefully.

Reproduction

Pseudoceros hancockanus is hermaphroditic, possessing both male and female reproductive organs. They can reproduce both sexually and asexually. In the aquarium, they may lay eggs which can develop into new individuals, contributing to the population in the tank.

Symbiosis

While not known for any specific symbiotic relationships, Hancock's Flatworms are part of the complex reef ecosystem and contribute to its diversity. They may engage in cleaning behaviors, consuming detritus and small organisms that could otherwise accumulate in the aquarium.

Habitat

In the wild, Pseudoceros hancockanus is typically found in tropical and subtropical reefs, often hiding under rocks or within crevices during the day. They are more active at night when they venture out to feed. Their natural range includes the Indo-Pacific region, where they inhabit various depths, often associated with coral reef structures.