Phyllacanthus
Phyllacanthus is a genus of sea urchins in the family Diadematidae. These urchins are characterized by their long, slender spines, which are often tipped with a black or dark-colored band. They are found in the tropical waters of the Indo-Pacific region, inhabiting coral reefs and rocky shores. The genus is known for its venomous spines, which can inflict a painful sting.
Common Names
Phyllacanthus sea urchins are commonly known as "pencil urchins" or "spiny urchins" due to their long, sharp spines that resemble pencils.
Characteristics
Phyllacanthus species exhibit several distinctive characteristics:
- Spines: Long, slender, and often tipped with a black or dark-colored band. The spines are venomous and can inflict a painful sting.
- Test: The test (or shell) is usually covered with small, granular tubercles.
- Coloration: Varies depending on the species, but they are often found in shades of brown, gray, or green.
- Size: Can reach sizes up to 15 cm in diameter.
Environments
Phyllacanthus sea urchins are found in the tropical waters of the Indo-Pacific region, inhabiting a variety of environments, including:
- Coral reefs
- Rocky shores
- Seagrass beds
References
For further information on Phyllacanthus, consult the following sources: