Definition
Mirogrex hulensis is a species of freshwater fish in the family Cyprinidae, formerly endemic to Lake Hula in the Hula Valley of northern Israel. The species is considered extinct.
Overview
- Taxonomy: Kingdom Animalia; Phylum Chordata; Class Actinopterygii; Order Cypriniformes; Family Cyprinidae; Genus Mirogrex; Species M. hulensis. The species was formally described in the mid‑20th century by ichthyologists Goren and Fain.
- Distribution and habitat: The species was known only from the shallow, freshwater environments of Lake Hula and its associated marshes. These waters supported a unique assemblage of endemic aquatic fauna.
- Extinction: In the early 1950s the lake was drained for agricultural development, leading to the loss of the natural habitat of M. hulensis. Subsequent surveys have failed to locate any surviving populations, and the International Union for Conservation of Nature (IUCN) lists the species as extinct.
Etymology / Origin
The specific epithet hulensis is a Latinised reference to “Hula,” the name of the lake and valley where the fish was found. The generic name Mirogrex combines the Greek “mir” (wonderful or notable) with “grex,” a common suffix used in cyprinid genera, though the exact derivation was not explicitly documented by the original describers.
Characteristics
- Morphology: Detailed morphological descriptions are limited. As a member of the genus Mirogrex, the fish is presumed to have possessed the typical cyprinid body plan: an elongated, laterally compressed body, a terminal mouth, and a silvery or lightly pigmented integument.
- Size: Reported adult lengths range around 10–12 cm, but precise measurements are not well documented.
- Ecology: The species likely fed on planktonic organisms and small invertebrates, similar to other Mirogrex species. Accurate information on its reproductive biology, diet, and behavior is not confirmed.
Related Topics
- Lake Hula – the former lake and marsh system in northern Israel, drained in 1951–1958.
- Extinct freshwater fish – other fish species that have disappeared due to habitat loss, such as the Aphanius spp. of the Hula Valley.
- Cyprinidae – the family of carps and minnows, one of the largest families of freshwater fishes.
- Habitat destruction and biodiversity loss – the broader environmental context of species extinctions linked to wetland drainage and land‑use change.
Note: Comprehensive morphological and ecological data for Mirogrex hulensis are scarce, and many aspects of its biology remain undocumented. Accurate information is not confirmed for several specific traits.