Abstract: The biochemical compositions and fiber of muscle were detected among four crucian carp including Pengzesis (Carassius auratus), gibel carp (Carassius auratus gibelio), red (Carassius auratus red v. Xiangjiang), and new selected variety changfeng (Carassius auratus gibelio). The result showed that the fiber density of changfeng, the Pengzesis, gibel carp, and the red were (184.2624.11), (149.7212.51), (134.4515.96), and (119.8522.86) fiber/mm2, respectively. There were no obvious difference among changfeng, Pengzesis and gibel carp about crude protein, the total amino acid and delicious amino acid. The highly unsaturated fatty acid (n3) of the changfeng, Pengzesis, gibel carp, and the red were about 24.2%, 14.4%, 11.3% and 8.3%, respectively. Especially, the docosahexenoic acid (DHA) content of changfeng, the Red, Pengzesis, and gibel carp were 10.3%, 4.9%, 4.5% and 2.9%, respectively, and the arachidonic acid (AA) content changfeng the Pengzesis, gibel carp, and Red were about 8.3%, 5.1%, 3.8% and 0.6% respectively. These data suggest that the quality of the new selected variety changfeng is superior to Pengzesis and gibel carp. The changfeng gibel carp is a potential variety for aquaculture with brilliant future.