Great ID work! Killifish are a very interesting family. A challenge to keep in captivity, and often quite beautiful!
Any guesses before I answer Joel?
OK Joel, thanks for the question. This species is known as the mummichog. It’s a member of the topminnow or killifish family. It’s scientific name is Fundulus heteroclitus. They are small fish usually less than 5 inches and can show up with gorgeous white and yellow spots over a green, tan body. The females are typically larger, paler, and drabber. The males can have vivid coloration especially in the breeding season.
Mummichog live in shallow marsh habitats. They are extremely abundant in these marsh areas of the western Atlantic. They are very hardy and can survive in difficult conditions with high temperatures, pollution, or low oxygen levels. They will eat just about anything that can fit in their mouth, dead or alive. Being small, they are a very important prey species to…
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