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The California golden trout has been the official freshwater state fish of California since 1947. They are closely related to 2 rainbow trout subspecies. These fish face the threats of hybridization and introgression which can cause genetic pollution due to interbreeding with other trout species. This has caused such a […]

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This article was originally published on Critter Science.

The iridescent shark, aka iridescent shark catfish, despite its primary common name, is not an actual shark, but a species of catfish. They dwell in the Mekong basin as well as the Chao Phraya River in southeastern Asia, and are heavily cultivated for food in that region. These fish face […]

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This article was originally published on Critter Science.

The Guiana dolphin, aka estuarine dolphin or costero, hails from the coastal & estuary waters to the north & east of South America, and east of Central America. These dolphins face the threats of overfishing and getting caught in long lines as well as fishing nets; water pollution; microplastics pollution; […]

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This article was originally published on Critter Science.

The European sea sturgeon, aka Atlantic sturgeon or common sturgeon, were once abundant and found in coastal habitats all over Europe. Now they can only be seen in the Black Sea and Baltic Sea. They face the threats of habitat loss and destruction at the hands of mining and quarrying […]

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This article was originally published on Critter Science.

The Atlantic sturgeon is not only native to both sides of the Atlantic Ocean, but they are also associated with river basins as well. They are often considered a living fossil. These large fish face the threats of habitat loss and destruction at the hands of residential and commercial developments, […]

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This article was originally published on Critter Science.

The ostracod, aka ostracode or seed shrimps, are small crustaceans that are usually only 0.0079 inch, but can be up to 1.3 inches. They have a bivalve-like valve, aka “shell”, made of chitin, and many times calcium carbonate. They can be found among zooplankton in ocean waters and fresh water […]

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This article was originally published on Critter Science.

The Eiselt’s caecilian is a type of caecilian that hails from Brazil and possibly Bolivia. These unique and fascinating creatures are amphibians. They prefer to dwell in warm, turbid, fast-flowing waters within the lowland Brazilian Amazon basin, primarily in the Madeira River and near the mouth of the Amazon River. […]

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This article was originally published on Critter Science.

The longcomb sawfish, aka narrowsnout sawfish or green sawfish, can be found in the tropical and subtropical coastlines of Africa, Middle East, south Asia, Australasia, and Australia. Due to habitat loss at the hands of residential and commercial developments, oil and gas drilling, mining, quarrying, and dams; overfishing; and climate […]

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This article was originally published on Critter Science.

The beluga sturgeon, aka great sturgeon, dwells in the Caspian and Black Sea basins, and previously in the Adriatic Sea. They are the 3rd largest species of bony fish, with the Mola mola – ocean sunfish being number 1 at 10.8 feet and 2.3 tons! Due to overfishing, over harvesting […]

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This article was originally published on Critter Science.

The Karpathos frog belongs to the Ranidae (true frog) family. They can only be found on the island of Karpathos, in the South Aegean Sea, in Greece. They prefer rivers, intermittent rivers, freshwater lakes, intermittent freshwater lakes, freshwater marshes, intermittent freshwater marshes, arable land, ponds, and Mediterranean-type shrub vegetation. These […]

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