There is already some evidence suggesting that the ringed seal, a phocids species that is similar in size to the harborseal, 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。
2
In experiments, a blindfolded harborseal can detect the passage of a fish by using its whiskers to sense changes in flow velocity - even 30 seconds after its prey has passed by.