Chlorodiella cytherea

Chlorodiella cytherea is a small marine crab species belonging to the Xanthidae family, known for its wide distribution in the Indo-Pacific region, including areas like 🇹🇼 Taiwan, the 🇨🇰 Cook Islands, Tuamotu (🇵🇫 French Polynesia), and Hawaii. These crabs thrive in subtropical coral reef environments, from intertidal zones to depths of up to 5 meters (16 feet).

This species features a brown carapace, approximately 2.5 centimeters (1 inch) in size. The shell is rounded and displays distinctive spots, with nearly fused anterolateral teeth that aid in camouflage among coral and rubble.

Chlorodiella cytherea is an omnivorous creature that predominantly feeds on algae but also consumes other plant material and occasionally hunts small invertebrates. Its ability to adjust its diet helps maintain the balance of algae growth, contributing to the health and diversity of reef ecosystems. The crab prefers hard substrates of coral reefs but can also inhabit fine sand surrounding these areas.

Reproduction in these crabs, like many in the order Decapoda, typically involves a precopulatory courtship ritual that relies on olfactory and tactile cues, followed by indirect sperm transfer. This species plays an essential role in the ecosystem, not only by managing algae populations but also by serving as prey for predatory fish, thereby supporting the reef's biodiversity.