This isn't quite exact, but 1/4 cup of butter (so a half stick if you're in the US) is 57 grams according to the conversion chart from allrecipes below. So use just a slightly heavy 1/4 cup or 1/2 stick.
Yellowtail, including Yellowtail Jack (Seriol landei), are recognized by a yellow stripe across their body and their yellow tail. Range & Habitat: Yellowtail is caught year round, but more commonly during summer in the Pacific Coast and the Sea of Cortez. They are caught primarily with hook and line, and their average weight is 10 to 20 lbs.
Colour patterns tend to be silver-gray, brown, black, red or cream. The ventral areas are typically lighter and the tail is usually brown or black. The muzzle is marked with dark patches. The common brushtail possum has a head and body length of 32â58 cm with a tail length of 24â40 cm. It weighs 1.2-4.5 kg. Males are generally larger than females.