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The long jaws and deep brain pan of the Indus river dolphin are visible from this skull cast. From the collection of The Children's Museum of Indianapolis.. The Indus river dolphin was described in 1853 by Richard Owen under the name Platanista gangetica, var. minor, based on a dolphin skull, which was smaller than skulls of the Ganges river dolphin.
Indus dolphins have more teeth than Ganges dolphins, averaging 33.2 teeth in the upper jaw and the 32.9 in the lower jaw, as compared to 28.4 in the upper jaw and 29.4 in the lower. [3] Living in murky waters, South Asian river dolphins are nearly blind, their tiny eyes having flattened corneas and no lens.
River dolphin skulls have small eye orbits, a long snout and eyes placed on the sides of the head. River dolphins are rather small, ranging in size from the 5-foot (1.5 m) long South Asian river dolphin to the 8-foot (2.4 m) and 220-pound (100 kg) Amazon river dolphin.
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Opponents argue that interactions between humans and dolphins have had a negative impact on dolphin populations both in the wild and in captivity, [6] and that the practice can be dangerous for humans. [4] Concerns over animal welfare have led to bans on swimming with dolphins in Costa Rica, [7] as well as certain locations in New Zealand and ...
Several bottlenose dolphins in the Gulf of Mexico were found to have traces of fentanyl in their system, shocking scientists and bringing in a new set of questions in the ongoing drug epidemic ...
Glaucoma is a progressive condition the eye causes damage to the optic nerve. [7] The damage to the optic nerve is usually caused by intraocular pressure [8] of the eye being elevated. Glaucoma can be seen in dogs, and less commonly, cats. Treatment [9] can be in the form of ocular medication, like prescription eye drops.