No they are not ofcourse not
YES they are
no there not endanger
The plural of otter is otters.
Same reason it endangers many other aerobic (air-breathing) animals who live at/near the sea - the oil interferes with natural oils produced by the animal for buoyancy - reduced ability to float or swim (drowning).
Endangered is the past participle of endanger.
No, male otters do not drown female otters during mating.
There are sea otters and other otters. In the category of "other" otters, you can include the North American River Otter, Giant Otter of South America, Asian small clawed otters, Congo clawless otters, Capr clawless otters, Southern river otters, hairy nosed otters, spot necked otters, neo tropical long tailed otters, and others I may fail to mention.
Otters
Otters.
mostly river otters, sea otters and other types of otters.
Dinosaurs are very endanger animals
People are questioning it, but I have heard that the adverb for endanger is dangerously.