There are 6 bestiary entries from missions accessed via the Republic faction planet Tython. All six are required for the Beastmaster of Tython achievement.
A Guid codex entry location obtained from a Greater Guid.
Codex type: Bestiary
Codex location: Tython
Codex coordinates: -399, -126
Faction: Republic
Class: Jedi Consular - Jedi Knight - Smuggler - Trooper
Associated Achievement: Beastmaster of Tython
A Horranth codex entry location obtained from a Horranth Matriarch.
Codex type: Bestiary
Codex location: Tython
Codex coordinates: -60, 104
Faction: Republic
Class: Jedi Consular - Jedi Knight - Smuggler - Trooper
Associated Achievement: Beastmaster of Tython
The Manka Cat codex entry location obtained from a conversation.
Codex type: Bestiary
Codex location: Tython
Codex coordinates: 172, -439
Faction: Republic
Class: Jedi Consular - Jedi Knight
Associated Achievement: Beastmaster of Tython
Special Requirements: You must progress the mission 'Pilgrim Medicine' to gain access to this title
A Tythonian War Droid codex entry location obtained from a Tythonian Seeker.
Codex type: Bestiary
Codex location: Tython
Codex coordinates: -346, -34
Faction: Republic
Class: Jedi Consular - Jedi Knight - Smuggler - Trooper
Associated Achievement: Beastmaster of Tython
The Uxibeast codex entry proximity location.
Codex type: Bestiary
Codex location: Tython
Codex coordinates: -95, -950
Faction: Republic
Class: Jedi Consular - Jedi Knight - Smuggler - Trooper
Associated Achievement: Beastmaster of Tython
A Wingmaw codex entry location obtained from a Wingmaw Bonecleaner.
Codex type: Bestiary
Codex location: Tython
Codex coordinates: -541, -11
Faction: Republic
Class: Jedi Consular - Jedi Knight - Smuggler - Trooper
Associated Achievement: Beastmaster of Tython