With all the concern about large baleen whales, it's almost easy to
forget the toothed
whales that mostly escaped whaling.
But some, particularly those that live in freshwater rivers, are on
decline. In fact,
there are some on the brink of extinction such as the Vaquita Dolphin.
main threats they face are
pollution of the waters, habitat destruction (rainforest
deforestation), and hunting.