Make the given text more coherent.
Generally, the fish range from 25 to 40 centimetres in length, and weigh about 1000 grams. Specimens have been recorded up to 50 cm long and 1.5 kg in weight.
Generally, the fish range from 25 to 40 centimetres in length, and weigh about 1000 grams. However, specimens have been recorded up to 50 cm long and 1.5 kg in weight.