Rows of black chromatophores precisely begin from the auditory sensory part of the tail region. The margins of the rays become branched rays, but no such condition is observed at the edges. The edges of the entire dorsal fin are deep and dark in color. The front margins of all these spots are somewhat concave. Fig. The caudal fin contains 20 fin rays. They eat the most food from 8-9 am (Jana and Chakrabarti, 1988). Pap. The dorsal fins have 19 fin rays, of which the first three fin rays are unbranched. The lateral line organ is complete. Pelvic embryonic fins fold exists. It has large, greyish scales on its dorsal side and whitish on its belly. The operculum region of fish is red. When the length of the fish is 24 mm, the formation of scales begins. amzn_assoc_default_search_phrase = "Tablets"; The fins are also black, but the pectoral fins are much whiter. It is in the carp family Cyprinidae. They have no barbells. At this time 15 fin rays are seen on the dorsal fin. This structure is more or less noticeable from the marginal area. Larva of Catla catla: 72nd  hours after hatching, At this time the larvae are 7.56 mm long. Irregular movements can be noticed. The front edges of the eyes are light red. The dorsal fins have 19 fin rays. They rest on the side of the dwelling and rarely come to the surface. Dorsal and ventral  embryonic folds are present and do not contain chromatophores. [4][5] amzn_assoc_tracking_id = "mywebsit03240-20"; amzn_assoc_ad_mode = "manual"; The anterior part is reddish and the posterior part is long. The diameter of a mature egg is 4.5-5.4 mm with averages of 5.0 mm in diameter (Figure-2). They feed on the surface of the water. [1], It is one of the most important aquacultured freshwater species in South Asia. The eyes are colorless in most cases. The caudal fin has 32 rays, of which the dorsal and ventral margins of the first 7 fin rays are unbranched. Catla (Labeo catla), (Bengali: কাতলা, romanized: kâtlâ) also known as the major South Asian carp, is an economically important South Asian freshwater fish in the carp family Cyprinidae. amzn_assoc_placement = "adunit0"; Catla fish accounts for 18% of the total pond production in Bangladesh. The pelvic fin contains 9 fin rays. In this article, we will discuss about the Catla calta and its life history. Adults feed on zooplankton using large gill rakers, but young ones on both zooplankton and phytoplankton. 41236).Mature individuals breed in rivers (Ref. The chromatophores above the lateral line are more numerous in numbers and darker in color. A few black chromatophores are seen on the dorsal side of the posterior myotome and yolk sac. However, the pigmentation under the notochord of the caudal region in Catla is more pronounced. The caudal fin is deeply bifurcated. The edges of each of the 7 out of 34 fin rays of caudal fin are unbranched. The edges of the upper lip are dark. The length of the fish is 12.5 mm. Except for the first two rays of the anal fin, the others are branched. Larva of Catla catla: 24th  hours after hatching. pp. amzn_assoc_marketplace = "amazon"; The ratio between the total length and the length of the base of the dorsal fin is 5.7: 1. [6], Catla is sold and consumed fresh, locally and regionally. The ratio of the total length and the length of the base of the dorsal fin is 5:1. The length of the fish is 23 mm. The caudal fin contains 24 fin rays. Fig. Post larva of Catla catla: 6th days after hatching. A line of black chromatophores can be seen in the anterior margin of the dorsal fin. Apart from that, they are accustomed to pick and eat small food particles. amzn_assoc_asins = "B00DQZ64YC,B004WYX4AS,B000A38F3Q,B000A2KAXU,B002C014JW,B0000ANHSZ,B002R0F9LG,B0012M2O90,B007HJFVNI"; Figure: Moves vertically, occasionally rising obliquely upwards. 4:132-161. Bangladeshher Matshya Sampad (in Bangali). The apex of the dorsal fin is covered by yellow pigment. On the top of the caudal peduncle, there is an incomplete light green triangular-shaped area. Etc, (Chakrabarti and Sharma, 1997; Kumar and Chakrabarti, 1998; Kumar et al., 2000). Black chromatophores can be seen in the lateral line. Table: Different stages of larval life of Catla, Length to the rear end of the notochord (mm). Spots can be seen on the fins. amzn_assoc_search_bar = "true"; Best Aquarium Stands: Review and Buying Guide 2020, Best Anatomical Skeletons: Review and Buying Guide 2020, Best Lab Coats: Review and Buying Guide 2020, Best Filter for Turtle Tank: Review and Buying Guide 2020, Best Nano Reef Tank: Review and Buying Guide 2020, Osteichthyes: Characteristics, Classification and Examples, Tilapia: Physical Description, Habitat, Reproduction and Economic Importance, Fish Scales: Types, Development and Functions. The length of the fish is 16.5 mm. ATM Publications, 38/3, Banglabazar, Dhaka. amzn_assoc_search_bar = "true"; They cannot take any food from the bottom and they cannot afford to eat aquatic weeds. The caudal fin contains 32 fin rays. There is a thin embryonic fins fold that starts from the tip of the pelvic fin and ends at the anal fin. The upper caudal fin lobe is slightly longer. amzn_assoc_linkid = "8176995fc60e05367dcce2a1fda714d5"; India, Misc. The length of the fish is 28 mm. Save my name, email, and website in this browser for the next time I comment. Catla fish live in major rivers of Bangladesh including Buriganga, Meghna, Beel, Haor, and Baor (Oxbow lake). Four-day-old fry eats Brachionus spp., Ceriodaphnia spp. Fig. The body is golden yellow. The surface of the body is gray, the sides of the body are silver and the abdomen is white. There is a star-shaped black chromatophore above the head. The pectoral fins do not contain any chromatophores.  days after hatching. The body is completely covered by scales. A series of black chromatophores are seen behind the eyes that extend from the pelvic region to the caudal peduncle.