Yellow Watchman Goby

A Yellow Watchman Goby is a small, vibrant yellow colored marine fish with a slender body, large eyes, and a rounded snout, known for its symbiotic relationship with pistol shrimp where it acts as a lookout, often found in the sandy bottoms of tropical Indo-Pacific reefs, and recognized by its bright yellow coloration which can vary in intensity, sometimes with small blue flecks on its head and body; scientifically named "Cryptocentrus cinctus". 

Key features:

• Color: Primarily bright yellow, with potential variations in shade depending on the individual. 
• Body shape: Elongated and slender. 
• Eyes: Large and prominent. 
• Distinctive behavior: Forms a symbiotic relationship with pistol shrimp, where the goby warns the shrimp of predators by tail movements while the shrimp digs burrows for both to hide in. 
• Habitat: Sandy bottoms of coral reefs in the Indo-Pacific region.