Start with high-confidence fish books, then narrow by subgenre or adjacent topics.
Eels
James Prosek
The Book of Eels
Patrik Svensson
Making Salmon
Joseph E. Taylor III
What a Fish Knows
Jonathan Balcombe
Every Last Fish
Rose George
Peterson Field Guide to Freshwater Fishes, Second Edition
Lawrence M. Page, Brooks M. Burr
The Illlustrated Encyclopedia of Fish & Shellfish of the World
Derek Hall, Daniel Gilpin
A Field Guide to Coastal Fishes
Valerie A. Kells, Kent Carpenter
A Field Guide to Tropical Reef Fishes of the Indo-pacific
Gerald R. Allen, Roger Swainston
Salmon Wars
Catherine Collins, Douglas Frantz
Valerie A. Kells, Luiz A. Rocha
The Great White Shark Handbook
Greg Skomal
The Shark Handbook: Third Edition
Greg Skomal, Gregory Skomal
Underwater Guide to Seychelles
Rowena Walton
The World Beneath
Richard Smith
