Animal Companion Descriptions
System: Pathfinder | SRD | Type: animal_companion
Animal companions listed in order of effective druid level can be found here
Each animal companion has different starting sizes, speed, attacks, ability scores, and special qualities. All animal attacks are made using the creature’s full base attack bonus unless otherwise noted. Animal attacks add the animal’s Strength modifier to the damage roll, unless it is its only attack, in which case it adds 1-1/2 its Strength modifier. Some have special abilities, such as scent. As you gain levels, your animal companion improves as well, usually at 4th or 7th level, in addition to the standard bonuses noted on Table: Animal Companion Base Statistics. Instead of taking the listed benefit at 4th or 7th level, you can instead choose to increase the companion’s Dexterity and Constitution by 2.
Starting Statistics
Size Medium, Speed 40 ft.; AC +4 natural armor; Attack bite (1d6), 2 claws (1d4); Ability Scores Str 14, Dex 16, Con 10, Int 2, Wis 15, Cha 10; Special Qualities low-light vision, scent.
7th-Level Advancement
Size Large; AC +2 natural armor; Attack bite (1d8), 2 claws (1d6); Ability Scores Str +8, Dex –2, Con +4; Special Qualities grab, pounce.
AmargasaurusSource
Starting Statistics
Size Medium; Speed 30 ft.; AC +3 natural armor; Attack slam (1d6), tail slap (1d6); Ability Scores Str 11, Dex 18, Con 9, Int 2, Wis 13, Cha 10; Special Qualities low-light vision, scent.
4th-Level Advancement
Size Large; AC +2 natural armor; Attack slam (1d8), tail slap (1d8); Ability Scores Str +8, Dex –2, Con +4; Special Qualities trample.
Anglerfish[Source]
The anglerfish is a fish that uses a bioluminescent lure at the tip of a stalk protruding from its head to attract prey.
Starting Statistics
Size Small; Speed swim 40 ft.; AC +1 natural armor; Attack bite (1d8 plus grab); Ability Scores Str 13, Dex 15, Con 12, Int 1, Wis 12, Cha 2; Special Qualities aquatic, grab (Medium), low-light vision, lure (sheds light as per a candle), scent.
4th-Level Advancement
Size Medium; AC +2 natural armor; Attack bite (2d6 plus grab); Ability Scores Str +2, Dex –2, Con +4; Special Qualities grab (Large), swallow whole (Medium).
AnkylosSource: d20pfsrd