In David Quammen’s NYRB review (Nov. 8, 2018) of Darwin Comes to Town: How the Urban Jungle Drives Evolution, by Menno Schilthuizen, he writes:
And then there’s a humble little fish called the mummichog (Fundulus heteroclitus), a bottom-wallowing native of brackish waters along the Eastern Seaboard, including big urban ports such as Bridgeport, Connecticut, that are silted up with decades of toxic chemicals such as PCBs and other industrial waste. A genetic study of Bridgeport’s mummichogs, Schilthuizen reports, found genome changes that protect those fish from the effects of PCBs. Who says there’s no good news in the Proceedings of the Royal Society of London?
I found the word mummichog enchanting; I looked it up in the OED (entry updated March 2003), where it is defined as:
A killifish; esp. Fundulus heteroclitus (family Cyprinodontidae), a small marine killifish of sheltered parts of the east coast of North America, which has dark and silvery vertical bars on the sides and is often kept in aquaria or used as bait.
The first and last citations are:
1787 T. Pennant Arctic Zool. II. Suppl. 149 Inhabits New York, where it is known by the Indian name of Mummy Chog.
1851 M. H. Perley Rep. New Brunswick (1852) 194 It [sc. the striped Killifish] is also known by its Indian name of ‘mummachog’, corrupted by the English settlers on the Gulf shore of New Brunswick, where it abounds, to ‘mammychub’.
[…]
1977 Audubon Sept. 8/1 The first modification of my reverent attitude resulted from my need for mummichogs, alias killifish.
1987 J. Hersey Blues (1988) 82 A handful of mummichogs, robust and chubby four-and five-inch light brown fish with dark bars along their flanks..swam downward from the surface.
The etymology is “< Narragansett moamitteaũg, plural (1643 in R. Williams A Key into the Language of America)”; I guess it’s not further analyzable, which is a pity. As for the almost as delightful killifish, the best the lexicographers can do is (in the words of the AHD) “Perhaps KILL² [i.e., ‘creek’] + FISH.”
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