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.
From 1990 to 1992 round gobies were found only in the areas adjacent to the St. Clair River: Lake St. Clair and in the first 2 km of the upper Detroit River. By 1993 round gobies were found in the Grand River near Cleveland, Ohio (Lake Erie) and in the Grand Calumet River near Chicago, Illinois (Lake Michigan).he fish in this harbor range from 12 to 140 mm (0.5 to 5.5 inches) in length, and likely represent two age groups. Round gobies are bottom-dwelling fish that perch on rocks and other substrate. They can grow to 25 cm (10 inches) as adults.