Final Fantasy 15 – Understanding Symbols in the Game

From my experience with fishing in FFXV the way you entice the fish is by doing short bursts of reeling in while moving the lure from left to right to get it moving. Once the fish bites make sure you get the QTE to hook the fish so you can start the reeling in process.

After you enter the reeling in phase slowly start to reel in the fish if you start to see the red and white flashing bar stop reeling in order to keep your line from snapping. If the bar tells you to move your left stick to the left or right make sure you do as such since it builds tension a lot if you fail to move your line. Also be sure to pay attention if the fish decides to jump in the water since it will prompt you for another QTE to keep the fish on the line. Repeat until you catch that fish!

And make sure you feed that cat!

Yes, you can take fall damage.

In the quest line for Dino at Guldan Quay, you have to find an ore outcrop. I fell off the cliff this was on top of and took 243 damage.

I didn't jump off the cliff, which might be a contributing factor, as a jump from height seems to produce a landing roll.

Edit
I have been unable to reproduce this in any way since.

Further edit
This is reproducable easily by jumping over the top tier of stairs on a watchtower. I have included a video of this.