Question: which animals mate for life?
Answer: Beavers. Adult beavers can weigh 40 pounds or more, and they mate for life during their third year. ... 
Gibbons. Gibbons are the nearest relatives to humans that mate for life. ... 
Wolves. ... 
French Angelfish. ... 
Shingleback Skinks. ... 
Swans. ... 
Albatrosses. ... 
Penguins.