When food enters the small intestine, bile travels through the common bile duct to reach the duodenum. Gallstones are hard deposits that form inside the gallbladder when there is too much bilirubin or cholesterol in the bile.
That said, there is a considerable consensus that all three major trout species (brook, brown and rainbow) begin to experience some level of stress at around 68Â°F (20Â°C), with that stress increasing rapidly as the temperature rises further.
What is the average length of a rainbow trout? The adult trout may be as small as 13 to 18 in (33 to 46 cm) with a weight of 1.0 to 2.5 pounds (0.45 to 1.1 kg). However, individual fish may be much larger, from 10 pounds uâ¦p to 30 pounds (4.5 to 13.5 kg) with a length of up to 36 inches (92 cm). The record for a rainbow trout (steelhead) is 48 pounds (22 kg).