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All jacks have the two free anal spines, be it a pompano, crevalle, or leatherjacket. There are nothing special about the spines.
It's a type of sea bass called a tattler. A trip last Sept we picked up three in 200' of water east of the river. It was one of several species that we kept, not knowing exactly what we had till we got back to the dock and keyed them out. However, we only had two marine biologist with master's degrees on the boat, maybe we needed three. We brought back 17 species and caught a total of 24 species.
There are three species in Louisiana striped bass, white bass, and yellow bass. There is also the hybrid striped bass which is a cross between a striped bass and a white bass. In south Louisiana striped bass are found in the rivers and coastal areas usually associated with current and rock jetties or other hard structure. They are found both in freshwater and saltwater. They have solid, unbroken black stripes and a body shape similar to a speckled trout, but can grow significantly larger.
White bass are scattered throughout freshwater areas of the state, but prefer flowing water of rivers and adjacent water bodies. They have a deeper body with smaller mouths and average around a foot in length.
Yellow bass are found in freshwater lakes and bayous, Lake des Allemands has a healthy population. They tend to average less than 8 inches and have very distinct black stripes and a golden coloration. Also the underside of the jaw has an iridescent purple hue especially during spawning season.
Hybrids are larger than a white bass, but smaller than a striped bass with the general body shape of a white bass. The stripes however are broken.
The diversions along the Mississippi River have all the species, although yellow bass are not very abundant. The stripers and hybrids are most common right at the structure in the turbulent water.
The river carpsucker is not in the carp & minnow family, it is in the sucker family along with buffalo. There are no native carp, if you are trying to keep a pure native aquarium.
If you put tilapia in your tank, just let the Wildlife and Fisheries know where it is so that they can hit it with rotenone. Live tilapia are illegal in Louisiana and if you get them from out of state, then it's also a violation of the Lacey Act. In 2009 there was an infestation of tilapia found in the drainage canals of Port Sulphur that took a major effort to poison.
There are three species of buffalo in Bayou Lafourche along with a few other sucker species that I find do better than catfish for cleaning the bottom. The suckers are generally river fish and are more abundant in the Donaldsonville area of the bayou. Your best chance for catching buffalo, catfish, and a variety of interesting native fish (unlike the potential invasive species that you find in pet stores) is the batture of the Mississippi River and the Bonnet Carre spillway in the spring when the river is in flood. In April of 2011 I caught five bigmouth buffalo that were a half inch long, today the one that I kept is 6 inches long and gets along great with my 15 year old spiny softshell turtle. The streams on the northshore can be a source for madtoms, which are small catfish that don't get much bigger than 4 - 6 inches. A dipnet will catch the fish, but a small seine would be much better.
Jules Ledet owner of the Harbor Light in Cocodrie has a barge that drives pilings. That's who my neighbors used two years ago at the intersection of Little Caillou and Bush Canal. He does good work and can use the business with the shape that the Harbor Light is now in.
In Bayou Bardeaux, which connects the eastern sides of Lake Cataouatche and Lake Salvador, two bullsharks were caught in July of 2007 and ten were caught in July of 2008. The sharks were all 30 - 40 inches. During that time Lake Cataouatche was 75% covered in submerged vegetation and the area was full of mullet.
In the same 2 year study of the Lake Cataouatche area 40,000 fish were caught of which 18,000 could also be found along the beaches of the gulf.
I have a Master's Degree in Marine & Environmental Biology from Nicholls.