What is a rat on a ship called? - briefly
A rat that lives aboard a vessel is called a ship rat, also referred to as a sea rat.
What is a rat on a ship called? - in detail
A rat that lives aboard a vessel is commonly referred to as a “ship rat.” The term designates the black rat (Rattus rattus), a species historically associated with maritime trade because it easily stowed away in cargo holds and survived long voyages.
The ship rat differs from the brown rat (Rattus norvegicus) in several respects. It is smaller, more agile, and prefers higher, drier environments such as deck rigging and pantry shelves. Its nocturnal habits and ability to climb make it especially adept at exploiting the confined spaces of a ship.
Historical records show that ship rats were present on European vessels as early as the 14th century. Their presence contributed to the spread of plague and other diseases, prompting early naval regulations that mandated regular fumigation and the use of cat crews.
Modern maritime practice still addresses the problem. Control methods include:
- Regular inspection of storage areas for gnaw marks and droppings.
- Trapping devices placed near entry points and food stores.
- Application of approved rodenticides under strict safety protocols.
- Deployment of shipboard cats on smaller craft where feasible.
Legislation in many countries classifies ship rats as invasive pests, requiring reporting of infestations and adherence to quarantine procedures when docking.
Understanding the biology of the ship rat—its reproductive rate, diet, and habitat preferences—remains essential for effective prevention and eradication on commercial and military vessels alike.