Equetus lanceolatus is a specific species of fish in the family of Gobiidae. It is commonly known as the "Spearhead goby" due to its pointed head. Some synonyms for Equetus lanceolatus include Tridentiger lanceolatus, Gobius longipes, and Gobiopterus lanceolatus. These names may be used interchangeably in scientific literature or by fish enthusiasts. The Spearhead goby is often found in marine and brackish waters in the Indo-Pacific region, especially in coral reefs and rocky areas. It has a distinctive coloration of brown and yellow stripes, with black spots on the tail. This species of goby is an interesting addition to aquariums due to its unique features.