greenland shark near the ocean ground, somniosus microcephalus - shark with the longest known lifespan of all vertebrate species

animal aquatic arctic atlantic attack big creature danger dark deep diving encounter extinction fish green greenland grey ground gurry harmless illustration jaws land life lifespan marine microcephalus nature north ocean old oldest predator rare scars science scratches sea shark sharks somniosidae somniosus species swim swimming threatened travel underwater water wild wildlife