Is this a Spinner Shark?

From the Lautoka Fish market.

Click for plenty of detail!

To me, it looks like a common Blacktip.

I feel that I've seen this guy before, and the pinnae sure don't look breves to me!

BUT - does that anal fin have a black tip?

If so, brevis or not brevis, it is C. brevipinna as that's one of the principal diagnostic features differentiating it from C. limbatus, at least in the Caribbean where they are sympatric!
Or may it, gasp, be Jeremy's wayward tilstoni, see the description here???

Opinions?

And I'm still waiting for a correct answer to my last question!