Thats definitly a captive breed, i would leave it on freshwater. 100% of the time fish store sells captive breed senegal bichirs, only a few store that ive seen sell wild caught since senegal bichirs are mass produced in asia and they are much cheaper and easier to get than wild ones.Just of the one I bought from them.. it was the only one there too.
I wasn't able to get a good clear full body pictures of him but here's a few I just took. I'm battling slime algae all over the tanks glass atm which makes getting a decent picture twice as difficult not to mention the little guy is a lightning bolt..
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