Cryptocentrus
Cryptocentrus is a genus of gobies found in the Indian Ocean, the Pacific Ocean, and the Red Sea. These fish are known for their distinctive, elongated bodies and their unique symbiotic relationship with certain shrimp species.
Common Names
Members of the genus Cryptocentrus are commonly known as "shrimp gobies" or "yellow watchman gobies" due to their association with certain shrimp species and the yellow coloration often seen in several species.
Characteristics
Cryptocentrus gobies are characterized by:
- Elongated, cylindrical bodies
- Large, prominent eyes
- A single dorsal fin with a distinct anterior spine
- A forked caudal fin
- A wide range of colors, including brown, yellow, orange, and black
Environments
Cryptocentrus gobies are typically found in shallow, coastal waters, often in association with coral reefs, rocky shores, and seagrass beds. They are known to inhabit burrows and crevices in the substrate, sharing these spaces with their symbiotic shrimp partners.
Symbiosis with Shrimp
The most notable characteristic of Cryptocentrus gobies is their symbiotic relationship with certain shrimp species, most notably the genus Alpheus, also known as "snapping shrimp." The shrimp digs and maintains a burrow in the substrate, while the goby acts as a vigilant watchman, alerting the shrimp to any approaching predators.
The goby's excellent eyesight allows it to detect danger from afar, and it will often signal the shrimp by making a quick, darting movement. This close relationship provides mutual benefits, with the goby gaining a safe home and food source, while the shrimp benefits from the goby's watchful protection.
References
For more information about Cryptocentrus gobies, you can refer to these reliable sources: