Here are some verified resources for reef creature identification in the Tropical Pacific that can be downloaded:
The Tropical Pacific is massive. A verified PDF should include range maps or at least region-specific codes (e.g., "FJI" for Fiji, "IDN" for Indonesia, "MHL" for Marshall Islands).
: Note that these official e-books typically use Adobe Digital Editions for DRM protection, allowing you to load the guide on up to 6 personal devices. Guide Content & Identification Groups
: You can purchase a verified Adobe DRM PDF ebook directly from the publisher, New World Publications
for resource managers which includes species identification sections. Pacific Islands Fisheries Guide : A free PDF from ResearchGate focusing on coastal food fishes and common invertebrates.