Freshwater Dolphin

Freshwater

Freshwater School District, Home of the Dolphins. Freshwater School District prides itself in being one of the top schools in Humboldt County that nurtures the abilities, talents, and interests of every child. Our campus setting promotes a love of nature, and a natural environment for study. Also known as the Humphead Cichlid or Malawi Dolphin, this fish is popular due to its bright blue coloring and ability to share an aquarium with other African cichlids. The Latin name for the Blue Dolphin Cichlid is Cyrtocara moorii. Its natural habitat is in the sandy areas of Lake Malawi in Africa. FRESHWATER & RIVER DOLPHINS PLATANISTIDAE During the great radiation, or dispersion, of marine mammals in the Miocene epoch, at least one group of cetaceans moved into estuarine and freshwater habitats, swimming far up the large rivers in tropical regions of the world. These animals were the platanistids, or river dolphins, now represented by four genera.

Freshwater Dolphin Teeth

Freshwater dolphins in usa

FRESHWATER & RIVER DOLPHINS
PLATANISTIDAE

During the great radiation, or dispersion, of marine mammals in the Miocene epoch, at least one group of cetaceans moved into estuarine and freshwater habitats, swimming far up the large rivers in tropical regions of the world. These animals were the platanistids, or river dolphins, now represented by four genera found exclusively in South America and Asia.

All river dolphins retain certain skeletal characteristics that are relatively primitive by comparison with other cetacean’s structures, and they are similar to those of the ancestors of all small cetaceans. River dolphins have extremely long beaks (one-fifth to one-seventh of the overall body length) and interlocking conical teeth to grasp fish and invertebrates stirred up from river bottoms. Typically, they have poor eyesight; the turbid waters of their habitat make good vision unnecessary. They do possess excellent echolocation abilities and make social noises as well, indicating that they branched off from their marine cousins after those adaptations were well underway. Because of their shy habits, the river dolphins are surrounded by superstition and are generally little known. In spite of their proximity to the human populations that crowd the shores of the great rivers where they live, they have no generally been intentionally for food. Nonetheless, their numbers are dwindling in many areas, due to pollution, irrigation projects, and other human activities. It has recently been proposed that the four genera of river dolphins represent four evolutionary departures from primitive dolphins and that each therefore deserves familial taxonomic status. While the evidence for this is compelling, we must wait until the arguments are aired in scientific literature. Here and elsewhere it is better to take the conservative approach in matters of classification.

Freshwater Dolphin

Freshwater Dolphin Fish For Sale

DolphinsFreshwater

Freshwater Dolphin Day

Reducing Threats

Endless Ocean Blue World Freshwater Dolphin

System planning: Sambor campaign and free flowing river section is maintained. This phase will urgently take up the issue of water infrastructure that is posing an immediate threat to river dolphin populations. This is especially critical in the case of the Irrawaddy dolphin subpopulation in the Mekong River. The initiative will support activities to prevent construction of the Sambor and Stung Treng dams in the core habitat of Irrawaddy dolphins.
Mapping polluters and habitat degraders. The initiative will map all major polluting industries and identify critical sectors in river dolphin habitats. This will develop a baseline and key industries to be targeted for adoption of water stewardship and transformation of their business practices, which will improve water quality in dolphin ranges.
Sustainable fisheries. A carefully targeted and practical review of fishery policies and laws in the river dolphin range countries will be conducted, with recommendations for specific changes needed to reduce the impacts of fishing on the dolphins.