Some animals have masculine words ending in -o and similar feminine words ending in -a.
Other animals have completely different words for the male and the female gender.
the stallion, the horse
And finally, there are animals which have only one grammatical gender, whether they are male of female.
We can use the words macho and hembra to distinguish between the male and female animals that have only one grammatical gender.
|el pez macho |
the male fish
|el pez hembra|
the female fish