The Mantis Shrimp, Thought To Have The Most Complex Visual System Ever Discovered In The Animal Kingdom. Humans Have 3 Types Of Photoreceptor Cells In Their Eyes, While Mantis Shrimp Have Between 12 And 16. They Can See Wavelengths Of Light And Color That Humans Cannot
NOT sting rays.
Ummm. A generation by definition is the next offspring. So, if you mean a time period or season say so.