Can you forgo your primary natural attacks to improve your secondary?

[Minigiant]

As a Giant Octopus, can I forgot using my Bite Attack to turn my 8 tentacles into primary attacks?

[avr]

No. It's phrased as being about having primary attacks, not about using them.

bestiary wrote:

If a creature has only one natural attack, it is always made using the creature’s full base attack bonus and adds 1-1/2 times the creature’s Strength bonus to damage rolls. This increase does not apply if the creature has multiple attacks but takes only one. If a creature has only one type of attack, but has multiple attacks per round, that attack is treated as a primary attack, regardless of its type.

[Scott Wilhelm]

That rule for turning Secondary Natural Attacks into Primary is intended for creatures like the Stegosaurus. They only have that Tail Attack. Normally Tail Attacks are Secondary Natural Attacks, but not the mighty Stegosaurus Tail!

[MrCharisma]

Are you a player or a GM?

As a GM you could give it the ADVANCED TEMPLATE which gives you back your attack bonus and some of the damage bonus, as well as some other benefits. It'll be +1 CR though (so CR:9), but then you have mostly what you were looking for.

As a player there's AUGMENTED SUMMONING which does mostly the same thing as the Advanced Template as far as your Natural Attacks are concerned.

If you're trying to Wild Shape or something I don't know anything off the top of my head to help, but someone else might know something you can use.

[Firebug]

If you are summoning the Giant Octopus, something like Master's Mutation can (probably) turn the bite into a tentacle. I say probably, because it says to select a primary natural attack and turn it into 'another' natural attack, would presumably could be a secondary instead of primary.