With a Cooking level of 72, the fish can be dissected with a knife to extract Zulrah's scales. Dissecting the fish can give 3-8 scales and 109-124 cooking experience. A player's Cooking level has an effect on how many scales are received when they are dissected. If your cooking level is in the mid 80s, you can expect to average around 5 scales per fish.
With 90 Fishing and Cooking, you can expect to gain about 21,300 Fishing experience, 23,800 Cooking experience, and about 1,200 Zulrah scales per hour.
According to High Priestess Zul-Harcinqa, people who eat the sacred eels will become one with the Zul-Andra tribe, and causes their original families and tribes to shun them as unclean creatures, forcing them to remain in Zul-Andra and worship Zulrah, who the tribe sees as their god.