Carl Wilhelm Erich Zimmer (Sondershausen, 29 September 1873 – Hüll bei Wolnzach, 8 November 1950) was a German zoologist specialising in crustaceans, especially the order Cumacea.
He studied zoology at the universities of Strasbourg, Munich and Breslau, receiving his doctorate in 1897.
From 1924 to 1937,he was a full professor and director of the zoological museum in Berlin.
[5] He is the taxonomic authority for the krill species Euphausia hanseni.
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