a group of longfin eels at lake lake rotoiti in nelson lakes, new zealand

anguilla anguillidae anguilliformes aotearoa beautiful body chordata dieffenbachii ducks eel endemic eye eyes fin fish fished freshwater good group horns hunter long longfin looking lots mobile mouth native nature new nostrils olfaction olfactory over predator reshwater risk rocks scary sense sensitive sensors serpent slimy smell staring stones swim swimming taniwha threatened tube tuna water waterdwelling zealand