Indian Springs Creek, Newport Beach, Orange County, CA. 11/24/07. Collected and identified by Richard Campbell
Common Brown Hydra
Hydra vulgaris. Barcode Index Number AAG7362
Hydrozoa: Hydridae
Size 1-5 mm; One of the few Cnidarians that live in freshwater, hydra are found in most streams and lakes. They cannot tolerate salt water. They are usually found on the undersides of leaves, sticks and stones resting on the bottom. There are about a dozen species, with only two reported from Orange County.
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Indian Springs Creek, Newport Beach, Orange County, CA. 11/24/07. Collected and identified by Richard Campbell
Indian Springs Creek, Newport Beach, Orange County, CA. 11/24/07. Collected and identified by Richard Campbell
Female sexual form in captivity. Specimen courtesy of Rob Steele, Kristine Glauber and Katie Dana in the Department of Biological Chemistry, University of California, Irvine.
Close-up of ovary and egg.
Male sexual form in captivity. Specimen courtesy of Rob Steele, Kristine Glauber and Katie Dana in the Department of Biological Chemistry, University of California, Irvine.
Close-up of testes