Personally my jury is out on that fish lol but I just wanted to add my two cents on Houston's local "wild" cichlid populations. I fish Buffalo Bayou constantly and you really can't use our introduced fish here in this part of the state as an example. Besides being introduced from farm raised aquarium fish they, at least I believe actively cross with other introduced fish. Not sure as to exactly what persay. . .
We call them Bayouhorns lol. I've caught some very strange looking TX's (odd patterns, larger than normal nuchal(sp?) humps, etc) there as well as convicts, tilapia, and j.demps. There's a huge rainwater spillway in Elanor Tinsley Park in Downtown that drains into lower Buffalo Bayou. It kind of creates a a warmwater refuge for invasives as well as, apparently, a shelter from the salinty flucuations this lower section of the bayou exp. from time to time. (at least that's my theory)
I've fished the Houston area for about 25yrs now and climate change has brought about some craziness in recent years. There are ponds near Eisenhower Park by Lake Houston that have breeding populations of Oscars in them now and Pacu are allegedly breeding in the upper portions of the bayous. I've encounter Pacu sporadicly in the bayous but I've yet to see proof of breeding other than, i dunno if you'd call this proof, one encounter with lg. group of them feeding on pecans off an on for a few weeks 3yrs ago. We were able to catch them with grapes hehe. Also several years ago when we had a manatee show up in the bayous downtown they showed the final capture live on t.v. after weeks of searching and as they enclosed the net dozens and dozens of adult pacu came leaping over the net smacking people in the face.
There have been several reports of cichla in Brays Bayou from local anglers but I've yet to see any proof.
Sorry I don't mean to derail the thread I just mainly wanted to point out that TX cichlids in Houston are IMO no way "wild".