Baril struggles to make anything out in the darkness.

Investigation: 8

Zahira stumbles about, not willing to risk a light.

Investigation: 13

Zahira, with your roll, you are able to make out tracks in the filth of the floor, leading directly into a wall. After fumbling about a bit in the darkness, you're able to push on part of the wall, and it opens up to reveal a small, secret doorway, marked with an S on this map. The doorway leads to another walkway underneath the main building of the fishery, which in turn leads to an entrance on the underside of the building.

Zahira waves to her companions and starts carefully treading down the passage.

[Perception: 19 Investigation: 12; Disad/Adv if applies {Per 12 Inv 21)]

Before following along Zahira, blue will briefly check into the small row boat sitting on the passage next to the door.

investigation 7

You find yourselves in a narrow space under the fishery. There is about three feet of room between the floor of the eastern side of the building and the languid, foamy river water below. Wooden pilings support the building, and thick mats of moss and cobwebs hang from the ropes and rusted chains between them. A wooden walkway floats on the river's surface, winding along the inner wall of pilings that supports the building's frame above. The walkway leads from the sodden ship to the east all the way west to a small two-and-a-half-foot-square door that leads into an understructure below the fishery's land-bound half. The pilings below this understructure are densely arrayed, leaving only narrow gaps into the water below that area.

Blue, you find nothing but refuse in the row-boat. Zahira, in the moonlight, you notice the telltale fin of a shark swimming in the riverwater below. It appears to be approaching the party. It then ducks down underneath the water, and swims under the walkway, bumping into it as it does so, causing the slippery slats to shake. I need everybody to make a Dexterity saving throw please, with advantage because Zahira likely pointed out the danger beforehand.

Dex Save: 12

Following the others with an arrow on the ready Ilsur eyes dart the darkness trying to find any lead to their quarry.

( Perception: 17 / Investigation 15 ) 

" A shark?" he says to Zahira trying to catch the fin breaking the surface of the water but then, all of a sudden the walkway shakes from below. 

( DEX ST: 23 ) 

"That's no a small one" he says trying to keep his balance.

Baril dex save: 18

Blue Dex Save (just for the sake of moving on): 8

Most of you are able to keep your footing on the shaking walkway, but Blue falls into the water! It's time to roll initiative!

Shark Initiative: 11

Baril init: 18

Zahira Initiative: 9

Blue initiative  14

Ilsur's initiative: 21

Ilsur(21),Baril(18),Blue(14),Shark(11),Zahira(9)

Ilsur, Baril, and Blue, go ahead and take your actions!

Baril speaks urgently, trying to keep his voice low.  "Help Blue.  I'll distract the shark."  Wobbling on the walkway, he crouches and stabs at the shark in the water, hoping to scare it off.

Longsword Attack: 16 Damage: 11

Ilsur tells blue 

"Swim back here! if he get close punch him hard in the nose" he says as he extends his hand towards him from the walkway "Come, come " he urges blue " Catch my arm" 

Blue, if you try to climb out of the water, make an Athletics check with advantage.

Blue Athletics  18

Blue reaches for Ilsur's hand and attempts to jump out of the water as quickly as possible while holding on to his hat....