Have you noticed the
very large gray fish in the pond in My Big Backyard and in the pond in the
Butterfly Garden? They are Grass Carp - an Asian species that is utilized to
eat algae and help control unwanted vegetation in ponds and other bodies of
water. We like to use them here at the Memphis Botanic Garden because they are vegetarian and therefore they pose no threat to smaller fish.
Also, some of you may be familiar with other carp species that have escaped into the Mississippi river and
other waterways that become major pests due to overpopulation. Our Grass Carp have been sterilized, so there is no danger of reproduction just in case they escape.