Dugongs and manatees are slow-moving herbivores that face welfare threats from boat strikes, entanglement, and habitat loss.
Boat strike injuries are a major cause of chronic suffering in manatees and dugongs. Propeller scars cover most Florida manatees and cause lasting injury. Cold stunning in winter causes hypothermia, immune suppression, and opportunistic infections in manatees. Seagrass habitat loss forces animals to travel further for food, increasing energy expenditure. Entanglement in fishing gear causes drowning and injury. Each individual lost takes decades to replace due to slow reproduction.