Though smaller than many other phocids, harbor seals are similar in size to most otariids.
虽然港海豹的体型较小，但其体型与大多数的 otariids（海狮和海狗）相似。
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。
There is already some evidence suggesting that the ringed seal, a phocids species that is similar in size to the harbor seal, may also use a maternal foraging strategy.
已经有一些证据表明环斑海豹，即一种体型与港海豹相似的海豹科物种，可能也会使用母性觅食策略。
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