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Guest
Cleaning and disinfecting equipment is a step many people forget about but has a huge impact on the ecosystems. There are countless instances in marine environments. Even in San Marcos, fish like tilapia and grass carp are actually considered detrimental to the ecosystem and have official regulations that say you must gut them immediately if you catch them. (Except in areas where they are using triploid grass carp, dont kill the triploid grass carp).
So if you are in poking distance to one while cleaning up the river, help clean the gene pool too. I do every time I'm spearfishing. I'll throw them in with all my other fish then take them out and feed 'em to the buzzards. But if it is a tilapia I'll definitely take it.
TPWD: General Fishing Rules for Fresh and Salt Waters
And this one has some links to look into...
Exotic Fish, Shellfish and Invasive Aquatic Plants
I thought there are no spears allowed in the river inside the city limits.