The 2008 Hydra app icon, credited to Susumu, as printed in The macOS App Icon Book on page 22.

The macOS App Icon Book · Printed page 22

Hydra

This is the Hydra app icon from 2008, credited to Susumu, as it appears in the printed The macOS App Icon Book.

Credit: Susumu ↗
Book: macOS edition
Artwork year: 2008
Printed page: 22

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More versions of Hydra

The 2020 Hydra app icon, credited to Creaceed Team, as printed in The macOS App Icon Book on page 22.