Planorbarius corneus (Linnaeus, 1758) is a freshwater snail from the family Planorbidae. All Planorbidae have hemoglobin in its respiratory system – in its blood. It is the same respiratory protein that transport oxygen in human’s blood. Albino specimen are quite popular in aquaria, but albinos occur in nature sometimes too. When a planorbid snail is an albino snail, then the color of its hemoglobin is clearly visible and the whole snail is in bright red color.
Photo of albino Planorbarius corneus on human hand:
Baker F. C. 1945: The molluscan family Planorbidae. The University of Illinois Press, Urbana. page 13.