Another thing that differentiate The Graceless Swan from other pirate ships was that they were also fishermen.
A pirate's life was never easy. There wasn't always a ship to pillage, and the rations often do not last long enough to restock during some days.
There were some that had livestock like sheeps and goats on board with the ship, but the Graceless Swan was unfortunately VERY short on manpower.
And so, they do not have enough people to raise those livestock nor take care of them.
In fact, an average-sized pirate ship should have at least about 20-30 crew members.
The Graceless Swan was a pretty small ship, but still, having 6 people on board was very lacking.
They had to make ten times the effort to survive than any other pirate crew.
And so, they have learned to fish. They steered away from large ships that may prey on them, and preyed on the ocean's creatures instead.