Narath will thoroughly check the room, under the table and everything.

Make a investigation check

Investigation: 7

You try to check but can’t find anything 

"Into the holds then?" Jodhr will say as he looks around impatiently (Not me, I'm patient just fine).

The holds are underwater so you would have to dive down to reach them 

Elle looks at Jodhr.

"Snippette might be perfect for scouting ahead."

If Jodhr is will in to send Snippette, Elle will cast Guidance on him.

You may send him 

Quote from JehanO >>

Elle looks at Jodhr.

"Snippette might be perfect for scouting ahead."

If Jodhr is will in to send Snippette, Elle will cast Guidance on him.

 "Great idea, let's send him down"

(If I'm looking through the crab's eyes, so I use Jodhr's stats or the crab's?)

You would use the crab’s stats

Perception: 21 

Crab has blindsight 30ft

Your crab sees a iron chest at the bottom of the hold

It will go explore to see if it can skitter inside

Roughly what size is your crab 

Tiny, like a hermit crab

He’s able to fit 

Aside from the chest it’s mostly just algae and some trash 

"Nothing in the hold, I'll start crawling him back up while'n the resta ya move down into the middle deck"

Narath will lead the way, sword drawn and observant.

Do you take the chest as well?