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.
Sand Sifting Gobies plow through the tank substrate, sifting/straining algae, detritus and uneaten food from the sand.This not only removes unwanted nitrate producing substances, it also stirs and aerates the sand (very important for Deep Sand Beds), releasing toxic gases. Diamond Sleeper Goby.he Sleeper Striped Goby (Valenciennea longipinnis) stirs the sand as it sifts through it, straining out food. This Goby is a carnovore, therefore its diet should include a variety of live and frozen brine shrimp, mysis shrimp, live black worms, and prepared foods for carnivores. More Â».