Wild Shape Natural Attack Damage Dice (Specific vs General)

[shadowkras]

From the effect of a supernatural ability duplicating the effect of a spell of the transmutation subschool polymorph, the druid gains the natural attacks of the assumed form and proficiency sufficient to use those attacks. The druid uses his own base attack bonus but his modified ability scores to determine attack bonus and final damage with these natural attacks.

However, more than once iv seen people mentioning both the Natural Attacks table from the Universal Monster rules, and mentioning the damage dice from the bestiary entry of certain creatures.

Example: The Behemoth Hippopotamus has a 4d8 bite (according to the table, 2d6), even though he has no special abilities to increase his bite damage. Which makes a Hippo's bite stronger than that of a Tyrannosaur (4d6), even being one size cathegory smaller.

So which one is official for druids? The general (universal monster rules) or the specific (individual creature statblock)?

[Imbicatus]

Specific entry found in the stat block.

[Chess Pwn]

you get whatever is listed in the individual creature's statblock.

[James Risner]

+1 in creature stat block. The table is for creating new creatures.

[Nefreet]

Furthermore, if the Druid had Improved Natural Attack (Bite), the damage would become 6d8.

[Taenia]

Or 8d8 with Strong Jaw, 16d8 vital strike plus strong jaw.