Black-ray goby mother bird regurgitating food to her chicks. This way, the shrimp and the goby are kept well fed. Sometimes, if the shrimp is not kept well fed, it will resort to killing the goby. In the wild, most burrows are shared by male and female goby pairs, with their respective shrimp partners, and the female goby will use this burrow as a nesting site to lay her eggs. The obvious benefits to both organisms of this symbiotic relationship make the interaction a form of mutualism. Here is an interesting example of this. The other fish is a dartfish (genus "Ptereleotris").
USS Blenny (SS-324) engaged in evaluating new equipment. "Blenny" was reclassified an Auxiliary Submarine, AGSS-324, c. 1969. She was decommissioned, 7 November 1969 and laid up in the Reserve Fleet. "Blenny" was struck from the Naval Register, 15 August 1973. She was sunk to form part of an artificial reef about fifteen miles (24 km) off the coast of Ocean City, Maryland in June, 1989. "Blenny" received four battle stars for her World War II service and one battle star for Korean War service. USS Blenny (SS-324) USS "Blenny" (SS/AGSS-324), a submarine, was a ship of the United States Navy named for the