Sea Apple (Pseudocolochirus violaceus)

Max Size: 8 inches
Diet: Filter Feeder
Temperament: Peaceful
Reef Compatible: Yes
Minimum Tank Size: 30 gallons
*Poisonous when stressed or dies*

The Sea Apple, also known as the Philippine Sea Apple, displays a variety of colors on its body and tentacles, but its feet are consistently yellow. The oral region of this species typically exhibits shades of blue to violet, which explains the common names Violet Sea Apple or Violet Sea Urchin.

For optimal care, the Sea Apple thrives in an established reef aquarium with ample space for movement and abundant live rock, which serves as its primary source of food. Once it finds a favorable spot, often in an area with strong water currents, it tends to remain there. To ensure the safety of the Sea Apple, it is crucial to protect all pump intakes and powerheads, preventing any possibility of being drawn in. This species is highly sensitive to high levels of copper-based medications, and sudden fluctuations in pH or salinity can cause it to shed its oral tentacles.

It is important not to house the Sea Apple in an aquarium with fish that may prey on its tentacles. Fish species known for picking on feather dusters are likely to target the tentacles of the Sea Apple as well. Examples of such fish include Butterflyfish, Large Angels, and any species listed as incompatible with invertebrates.

During feeding, the Sea Apple extends its oral tentacles into the water current to filter out food particles. Once the food is trapped, it withdraws the entire tentacle into its mouth. In an aquarium setting, a daily diet of phytoplankton, whether frozen, liquid, or dried, is essential for the Sea Apple's nutrition.