The dragon Ladon.
Draco.
Hesperides
I do not know if there is a special animal attributed to Atlas but he was famed for his flocks and herds and his garden of golden apples guarded by Hesperides.
Golden Apples.
Hera's golden apples grew in the Garde of Hesperides. Though the Hesperides were supposed to tend to the garden, the famed guardian of the golden apples is Ladon, the never-sleeping, hundred headed dragon.
The constellation 'Draco'. 'Draco' in Latin means 'dragon'. In Greek myths, 'Draco' would have represented the dragon Ladon that guarded the garden of the Hesperides and the golden apples.
In the traditional visualization of Hercules, he's kneeling with one "foot" on the "head" of Draco, who represents the dragon Ladon that guarded the garden of the Hesperides. In the myth Heracles killed Ladon to obtain the golden apples.
The golden apples of the Hesperides.
The daughters of Atlas, the Hesperides, lived in a fabulous garden located at the western extremity of the world. There they guarded (with the aid of the dragon Ladon) a tree that bore golden apples. Hercules killed the dragon and obtained the apples as one of his 12 labors.
The Greeks named it Draco the dragon. In one of the more famous European myths, Draco represents Ladon, the dragon sometimes depicted with one hundred heads who guarded the golden apples of the Hesperides. The eleventh of the Twelve Labours of Heracles was to steal the golden apples.
in one of Hercules's labours he got 3 golden apples from the Hesperides Garden
Its the Mount Atlas (northern Africa). The garden was Hesperides (Εσπερίδες).