Two white-blooded fish, two paths: Icefish and noodlefish independently lose red blood cell function

Antarctic icefish are famous for living without red blood cells, but they are not alone. A species of needle-shaped, warm-water fish called the Asian noodlefish also lacks hemoglobin and red blood cells. Like icefish, its veins are filled with translucent white blood, said H. William Detrich, professor emeritus of marine and environmental sciences, who collaborated with Chinese scientists on a paper about the strange aquatic creatures published in Current Biology.

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