Whether I have seen one or not is completely immaterial. What I said was that "I can find no verifiable report" of a sea snake in the Atlantic or Gulf of Mexico. It is possible that such a report exists and I have missed it, but I'm pretty good at this stuff. I have ready access to several research libraries as well as the internet. I have checked numerous reference texts. Useful ones include:
Biology of Sea Snakes. 1975. W.A. Dawson, ed.
Sea Snakes. 1987. H. Heatwole.
Venemous Reptiles of North America. 1992. C.H. Ernst.
Venemous Reptiles of the Western Hemisphere. 2004. J.A. Campbell and W.W. Lamar.
I have also looked up and read many of the scientific papers cited in those books (the journals are sitting here in my office so it wasn't a huge effort).
There were unconfirmed (no specimen, no photo) published reports of
Pelamis platurus (also known by the common names "pelagic sea snake" and "yellow-bellied sea snake") in the Caribbean in 1966 and 1970. There was some speculation (Kropach, 1972) about the possibility of
Pelamis platurus colonizing the Caribbean through the Panama Canal. A comprehensive 1974 (Hecht et al.) study of the distribution of
Pelamis platurus does not show their presence in the Gulf of Mexico or the Caribbean.
Campbell and Lamar (2004) summarize a report on several specimens of
Pelamis platurus collected off the Caribbean coast of Columbia. Although the original report is still in press and will appear in a Columbian journal to which I do not have easy access, these specimens are apparently verifiable. However, they appear to be incidental individuals likely dumped in bilge water from ships passing through the canal and don't appear to represent a reproducing population (yet). Columbia is also a very long distance from Texas.
All these reports refer to the same species. There are no reports of any other species of sea snake from the western hemisphere, much less the Gulf of Mexico. The usual color pattern of
Pelamis platurus does not match the pattern described in the original post (although all-yellow individuals were reported from the Bay of Panama by Kropach, 1971).
If you catch a sea snake on the Texas Gulf Coast it would be a sufficiently rare event that the scientific community would like to know about it. As I said before, please take the snake in any condition (carefully, they are dangerously venemous) to the Biology Department of the nearest university. If you brought one to me I would immediately add it to the amphibian and reptile collections that I curate
(ASNHC) and would write it up and get the report published.
Cheers,
Kelly McCoy