The phrase "seal limbs" can refer to the flippers or fins of a seal, which it uses for swimming and maneuvering underwater. Synonyms for this phrase could include "seal flippers," "seal appendages," "seal extremities," "seal fins," or simply "seal arms." These terms all describe the same anatomical features of the animal, but may be used interchangeably depending on the context. When discussing the unique adaptations of seals for aquatic life, for example, using the term "seal flippers" may be more appropriate than referring to them as arms or limbs.