On the cargo ship on which Lee and Alison's group were traveling were 2,000 spiritual beasts, three-quarters of which were beasts at the 3rd stage and 300 at the 4th stage.
Of the remaining numbers, all of them were 5th stage beasts, with a few dozen capable of flight, which was something quite sought after by regional experts.
Because of all these numbers, this was quite a valuable cargo being carried on that ship, which made Lee worry about the safety of such a thing.
They had not faced any problems so far on the journey here since many regional organizations were concerned with matters relating to the Minos war.
On the other hand, they had taken the necessary care to get this ship from a reliable organization, which certainly lessened the chances of trouble coming their way.
Finally, they had camouflaged that ship to make it look old, like those that carried low value-added goods.