You are given a sentence in Arabic. Your job is to translate the Arabic sentence into English.
Q: هذه الأسراج, الزنبرك الشبيه بالسرج — كان معروفا في الواقع منذ مدة لدى العديد من علماء الأحياء ليس كزنبرك بل كإشارة بصرية.
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
So, the saddles — that saddle-shaped spring — has actually been well known to biologists for a long time, not as a spring but as a visual signal.