There are 3 bestiary entries from missions accessed via the Republic faction planet Ord Mantell. All three are required for the Beastmaster of Ord Mantell achievement.
A Gapillian Grazer codex entry location obtained from a Greater Gapillian Grazer.
Codex type: Bestiary
Codex location: Ord Mantell
Codex coordinates: 610, -517
Faction: Republic
Class: Jedi Consular - Jedi Knight - Smuggler - Trooper
Associated Achievement: Beastmaster of Ord Mantell
A Razoronn codex entry location obtained from a Shallow Bay Razoronn.
Codex type: Bestiary
Codex location: Ord Mantell: Mannett Point
Codex coordinates: 653, 190
Faction: Republic
Class: Jedi Consular - Jedi Knight - Smuggler - Trooper
Associated Achievement: Beastmaster of Ord Mantell
A Savrip codex entry location obtained from a Savrip Champion.
Codex type: Bestiary
Codex location: Ord Mantell: Savrip Island
Codex coordinates: -661, -519
Faction: Republic
Class: Jedi Consular - Jedi Knight - Smuggler - Trooper
Associated Achievement: Beastmaster of Ord Mantell