Of course it's a valid reason. Invasive aquatic species have been causing problems in native waterways since I was a kid, here in Canada. What about the potential pathogens that some of those tropical species may be passing along to native species? The damage done to native flora & fauna?
S
skjl47
mentioned carp, I was fishing for common carp, a non-native nuisance species, in the Detroit River back in the 1960's. Now the State of MI is worried about Grass Carp showing up in the Great Lakes. You don't have to live in the state of FL to be exposed to the damage from invasive non native fish.
As a person who keeps tropical fish, I don't agree with this bill, but like it or not this **** storm has been building for several decades.