Mummichog

<p>The mummichog (<i>Fundulus heteroclitus</i>) is a small <a href="/facts/Killifish/FGj6wxGV">killifish</a> found along the Atlantic coast of the <a href="/facts/United_States/P0sCdLe5">United States</a> and <a href="/facts/Canada/D5P9yqs6">Canada</a>. Also known as Atlantic killifish, mummies, gudgeons, and mud minnows, these fish inhabit <a href="/facts/Brackish/f6z3UXCa">brackish</a> and <a href="/facts/Coastal/RBD0wxn3">coastal</a> waters including <a href="/facts/Estuaries/WmkSInmK">estuaries</a> and <a href="/facts/Salt_marsh/yV4Afzoj">salt marshes</a>. The species is noted for its hardiness and ability to tolerate highly variable <a href="/facts/Salinity/X6mB1YAM">salinity</a>, temperature fluctuations from 6 to 35 °C (43 to 95 °F), very low oxygen levels (down to 1 mg/L), and heavily polluted ecosystems. As a result, the mummichog is a popular research subject in <a href="/facts/Embryological/4mvpSkhC">embryological</a>, physiological, and <a href="/facts/Toxicological/L6XHRIJH">toxicological</a> studies. It is also the first fish ever sent to space, aboard <a href="/facts/Skylab/h7v9LWKE">Skylab</a> in 1973.
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Mummichog open-in-new

Mummichog