Among phocid pinnipeds, Phoca and Cystophora have been reported to hybridise, but again are from different 'subfamilies'.    From Wordnik.com.  [The deer-pig, the Raksasa, the only living anthracothere… welcome to the world of babirusas] Reference

Large-scale commercial harvests of arctic marine mammals are restricted to harp (Phoca groenlandica) and hooded (Cystophora cristata) seals.    From Wordnik.com.  [Management and conservation of marine mammals and seabirds in the Arctic] Reference

Ringed seals (Phoca hispida), bearded seals (Erignathus barbatus), and hooded seals (Cystophora cristata) are widely hunted in Greenland and Canada.    From Wordnik.com.  [Indigenous peoples, animals, and climate in the Arctic] Reference

Harp seal (Phoca groenandica) and hooded seal (Cystophora cristata).    From Wordnik.com.  [Yahoo! News: Business - Opinion] Reference

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Cystophora cristata), and grey seals (Halichoerus grypus.    From Wordnik.com.  [Featured Articles - Encyclopedia of Earth] Reference

Cystophora cristata) in the Greenland and Norwegian Seas.    From Wordnik.com.  [Featured Articles - Encyclopedia of Earth] Reference

Pagophila eburnean), Pacific walrus (Odobenus rosmarus divergens), ringed seal, hooded seal (Cystophora cristata), narwhal (.    From Wordnik.com.  [Green Options] Reference