Characin and Pirana

Characin noun - Any freshwater fish of the family Characinidae.

Pirana and characin are semantically related. In some cases you can replace term "Pirana" with "Characin", this nouns are similar.

Pirana noun - Small voraciously carnivorous freshwater fishes of South America that attack and destroy living animals.

Characin and pirana are semantically related. You can use "Characin" instead a noun "Pirana".