- Male sea otters reach sexual maturity at 5–6 years, females at 4 years. Males retain reproductive ability throughout their lives.
- A female sea otter's pregnancy begins with a delay and includes a latent phase lasting 2–3 months. The embryo does not attach to the uterine wall during this time, a development method shared by about 100 mammal species.
- Newborn sea otters are born with 26 already erupted teeth. This number is precisely stated in the formula provided in the text.
- With age, areas of the sea otter's skin not prone to graying darken from reddish tones to dark brown and black, while areas prone to graying, especially the head, lighten.
- A newborn sea otter can float on its back like a "float," but cannot swim or forage for food. It also cannot groom itself.
年龄海獭
在这里，我们介绍 海獭 能活多久，以及预期寿命如何随年龄变化。
海獭：它是怎样的