In addition, many species of sharks must keep swimming to breathe, for in this way they drive oxygen - rich water through their mouths and gills.
Turklāt lielākajai daļai haizivju sugu ir nepārtraukti jāpeld, lai varētu elpot, jo peldot tās dzen ar skābekli piesātināto ūdeni caur muti un žaunām.