Does tilapia have a blood line?

Chef's answer
It is the bloodline, and it is usually cut out of of fish, for having a "too fishy" flavor. In my experience, Tilapia is mild enough that I ignore it unless it is very thick and dark..
Frequently asked Questions 🎓
In Swordfish with Creamy Fennel-Tomato Sauce, it's recommended that you remove the blood line, a blood-rich muscle that runs through the center of some species of fish, especially strong swimmers like swordfish as well as tuna and mackerel. ... As the fish deteriorates, the blood line turns dull and brownish..
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