Consider the following animals : 1. Sea cow 2. Sea horse 3. Sea lion Which of the above is/are mammal/mammals?

1. Mammals are a class of animals characterized by features such as being warm-blooded, having hair or fur, giving birth to live young (in most cases), and nursing their young with milk produced by mammary glands. 2. Sea cow (Order Sirenia, including Dugongs and Manatees) is a marine mammal. They are herbivorous, warm-blooded, breathe air, and nurse their young. 3. Sea horse (Genus Hippocampus) is a type of fish, specifically a bony fish. They are cold-blooded, breathe using gills, and lack mammary glands. They are not mammals. 4. Sea lion (Family Otariidae) is a marine mammal, belonging to the group called pinnipeds. They are warm-blooded, breathe air, give birth to live young, and nurse them. 5. Therefore, among the given options, Sea cow (1) and Sea lion (3) are mammals.