Don't know about Blacktips but a juvenile Bull Shark was recently caught in the Atchafalaya River near Whiskey Bay. I think that was last week. As a child, I personally witnessed what my dad called a lemon shark in the cove cruise past our boat. We were in a 14 foot Joe Boat and that shark seemed to be as long as the boat. LOL

Black tip report
 

Go in Shark Bayou and fish live mullet and you can hook all the sharks you want right now.

Salinity up to 5-8 ppt. Sharks are EVERYWHERE !!!!!!