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.
Steelhead (Rainbow Trout). Oncorhynchus mykiss. Other names: steelhead trout, sea-run rainbow trout Average size: 8-11 lbs, up to 40 lbs. Steelhead and rainbow trout are the same species, but rainbow are freshwater only, and steelhead are anadromous, or go to sea.Unlike most salmon, steelhead can survive spawning, and can spawn in multiple years.Spawning. Steelhead spawn in the spring.teelhead (Rainbow Trout). Oncorhynchus mykiss. Other names: steelhead trout, sea-run rainbow trout Average size: 8-11 lbs, up to 40 lbs. Steelhead and rainbow trout are the same species, but rainbow are freshwater only, and steelhead are anadromous, or go to sea.