-1 PoA (not enough stuff on KCVDS to be certain of summoning Coelacanth early)
-1 Lightning Vortex (not 100% necessary like other cards here)
-1 Terraforming (only need 1 with the lineup you're using)
-1 Star Blast (Mausoleum will probably work better. I just gave this as an optional thing to try if you had space in the deck.)
-1 Water Hazard (again, this was only for if you had space in the deck.)
-1 Water Art
-1 Dustshoot (only run it when you have extra space in a deck. It's a good card, but almost never a necessary card.)
+1 Big Wave small Wave
+1 Mausoleum
+1 Bottomless Trap Hole (this should be run in 2's before you even think about running cards like Mirror Force. Hitting a monster when it's summoned is better than waiting for it to attack, because DAD, JD, Lyla, Breaker, and many others can destroy your traps before they attack.)
EDIT: I also just noticed that your synchro lineup is just awful. You're missing many of the more powerful synchro monsters. Try something like this instead:
1x Chimeratech Fortress Dragon (Cydrag at 2 this format warrants this)
1x Catastor
1x Goyo Guardian
1x Brionac
1x Black Rose Dragon
1x Ancient Fairy
1x X-Saber Urbellum
2x Stardust
2x Colossal Fighter
1x Thought Ruler
2x Red Dragon Archfiend
1x Mist Wurm
Since your deck uses Coelacanth combos, and Coelacanth summons mostly 7/8 star synchros, your extra deck should have more copies of those higher level synchro monsters. You were also missing some important synchro monsters in general.