<p>The <b>Kolekanos spinicaudus</b>, also known as the spiny-tailed fish, is a vibrant omnivore found in marine habitats like coral reefs and estuaries, recognized for its elongated body, spiny dorsal fin, and ability to change coloration. This species plays a crucial role in maintaining the balance of its ecosystem by regulating algal growth and forming symbiotic relationships with cleaner fish.</p>