通常情况下，野外的雄性灰海豹能活到25岁，但在该组织的悉心照料下，Yulelogs 刚满31岁。
Normally, male grey seals live to be around 25 years old in the wild, but under the good care of the organization, Yulelogs just turned 31.
与其他phocids物种（如灰海豹）相比，港海豹体型较小。众所周知，灰海豹在整个哺乳期都禁食。
Harbor seals are small compared with other phocids species such as grey seals, all of which are known to fast for the entire lactation period.
与其他phocids物种（如灰海豹）相比，港海豹体型较小。众所周知，灰海豹在整个哺乳期都禁食。
Harbor seals are small compared with other phocids species such as grey seals, all of which are known to fast for the entire lactation period.
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