natural attacks with tentacle

[Particle_Man]

I am thinking of a "natural attacker" build. Is there a way to add tentacles (that can be used for natural attacks) to a bite/claw/claw build, for example?

I looked at the alchemist discovery tentacle, but that seems to specifically disallow adding an attack form a tentacle to one's attack routine.

[James Risner]

There is a druid archetype that gives you wild shape as yourself with tentacles added. Kraken Druid or something similar.