Shigeru Shirai (白井 滋, Shirai Shigeru) is a Japanese ichthyologist specializing in elasmobranchs, especially sharks. He graduated from Hokkaido University's Laboratory of Marine Zoology with a PhD in Fisheries Science. He is an editor of Japan's Ichthyological Research journal and author of the book, Squalean Phylogeny. He died at the age of 63 on September 9, 2020.
Source: “Shigeru Shirai”, English Wikipedia (CC BY-SA 4.0), excerpt