Japanese Giant Salamander under rock in Nawa River, Slowly searching for prey

andrias japonicus japanese giant salamander osanshouo davidianus cryptobranchidae underwater river flowing water walking scene shot view alleganiensis cryptobranchus prehistoric amazing biodiversity wildlife river monster giant salamander hellbender foraging science research natural japan aquatic cute endangered species nature threatened endangered animal conservation amphibian reveal hiding under rock skin detail wrinkle tubercle nawa tottori daisen