Haidar

Too many ships come and go from the Al Jabbar, and none have their cargo inspected. So, nobody is sure how the Haidar got aboard the Al Jabbar. It became a problem when it had grown large enough to start killing people. The Al’ahmar Sina fought it back, and sealed it in a section of the ship. Now, the Aib Tisamat regularly feed it, so that it does not have to test to see if ship's bulkheads are enough to hold it back.
The Haidar's upright section stands larger than a man, and its claws have proven capable of crushing hard combat armor. Worse, it is poisonous, and it can whip it's tail to hurl it's poison covered spines.

Deadly enough that the clans on the Al Jabbar have ceded a section of the ship to it