The word 'their' is not a noun. The word 'their' is a pronoun, a possessive adjective. The pronoun their takes the place of a plural noun (or two or more nouns) that describes â¦ something as belonging to that noun(s).
This species can reach a length of 11 centimetres (4.3 in) TL. This species is sometimes kept in public aquariums. The sand goby is of a sandy colour, with darker markings on the sides and a creamy-white underside. In the breeding season the male fish has blue spot at the rear of the first dorsal fin, ringed with white.The fish has a slender body, and the head is about a quarter of the total length.his species can reach a length of 11 centimetres (4.3 in) TL. This species is sometimes kept in public aquariums. The sand goby is of a sandy colour, with darker markings on the sides and a creamy-white underside. In the breeding season the male fish has blue spot at the rear of the first dorsal fin, ringed with white.
Round gobies are a bottom-dwelling fish that can reach 10 inches in length. They have been known to steal bait from fishing lines and are unintentionally caught by anglers. Round gobies were first discovered in the St. Clair River in 1990 and have spread rapidly in the Great Lakes and some inland lakes.he round goby is native to the Black and Caspian Sea regions and was introduced to the Great Lakes through ballast water. Although adult gobies spend their lives near the bottom; however, larval gobies swim to the surface at night and are easily sucked into ballast tanks.