Thanks to Lantern Bearer reply, now I know what the strange fish that I posted few days ago.. Here’s more info about this strange looking fish. The Mudpuppies or Waterdogs are a family of aquatic salamanders. The mudpuppy family, proteidae, is divided into two genera – Necturus with six North American species, and Proteus with one European species. They represent an ancient group, dating from the time of the dinosaurs.
Mud puppies are aquatic salamanders that spend most of their time on the bottoms of lakes and rivers. They are found in southern Canada and in the eastern United States.
In contrast to more familiar amphibians such as frogs, mudpuppies never lose their gills during maturation from the tadpole into the adult stage– beneficial since they will spend their entire lives underwater. The adult gills resemble fish gills in many ways, but differ from fish gills in that they are external and lack any form or operculum or covering. The bright red exposed gills can be ‘flapped’ to increase water circulation during low oxygen tension conditions. Mudpuppies also absorb oxygen through their skin and by occasionally breathing air at the surface.
Mudpuppies prefer shallow lakes and streams but have been found in hundreds of feet of water. The mudpuppy’s diet consists of crayfish, snails, insect larvae, worms and small fish. Mudpuppies mature at four to six years and can live to be more than twenty years old. Progenesis is common for mudpuppies, enabling them to reach sexual maturity in their larval state.
Even though they will eat fish eggs, negative effects on fish populations have not been documented. Because mudpuppies eat off the bottom, fishermen will occasionally catch a mudpuppy if they are fishing off the bottom.
To distinguish between a mudpuppy and an immature salamander, note that mudpuppies tend to be much larger. The main difference between a mudpuppy and a siren is that sirens have only a pair of small (in comparison) front legs, whereas mudpuppies have both front and back legs.
This is another strange looking amphibian, called the Red Salamander. Although most salamanders have drab colors, some, such as this red salamander, have bright colors that set them apart from their surroundings. This species of salamander lives near brooks and springs in central to eastern North America.
Below is the Japanese Giant Salamander..
The Japanese giant salamander (Andrias japonicus) is endemic to Japan, where it is known as Ōsanshōuo (オオサンショウウオ/大山椒魚), literally meaning “giant pepper fish”. With a length of up to almost 1.5 m (5 ft), it is the second-largest salamander in the world, only being surpassed by the very similar and closely related Chinese giant salamander (A. davidianus). There are only three known members of the Cryptobranchidae family: the Japanese and Chinese giant salamanders and the Eastern hellbender.
Japanese giant salamanders are widespread across rivers in southwestern Japan. The species frequently hybridizes with Chinese giant salamanders, which were introduced to the area.
The axolotl (/ˈæksəlɒtəl/, from Classical Nahuatl: āxōlōtl [aːˈʃoːloːtɬ] ; plural axolotls or rarely axolomeh ), Ambystoma mexicanum, also known as the Mexican walking fish, is a neotenic salamander related to the tiger salamander. Although the axolotl is colloquially known as a “walking fish”, it is not a fish, but an amphibian. The species was originally found in several lakes, such as Lake Xochimilco underlying Mexico City. Axolotls are unusual among amphibians in that they reach adulthood without undergoing metamorphosis. Instead of developing lungs and taking to the land, adults remain aquatic and gilled.
Axolotls should not be confused with waterdogs, the larval stage of the closely related tiger salamanders (A. tigrinum and A. mavortium), which are widespread in much of North America and occasionally become neotenic. Neither should they be confused with mudpuppies (Necturus spp.), fully aquatic salamanders that are not closely related to the axolotl but bear a superficial resemblance.
As of 2010, wild axolotls were near extinction due to urbanization in Mexico City and consequent water pollution, as well as the introduction of invasive species such as tilapia and perch. They are currently listed by CITES as an endangered species and by IUCN as critically endangered in the wild, with a decreasing population. Axolotls are used extensively in scientific research due to their ability to regenerate limbs. Axolotls were also sold as food in Mexican markets and were a staple in the Aztec diet.
Surveys in 1998, 2003, and 2008 found 6,000, 1,000, and 100 axolotls per square kilometer in its Lake Xochimilco habitat, respectively. A four-month-long search in 2013, however, turned up no surviving individuals in the wild. Just a month later, two wild ones were spotted in a network of canals leading from Xochimilco. The city is currently working on conserving axolotls by building “axolotl shelters” and conserving remaining and potential habitats for the salamanders.
Axolotl Care: The Basics
AXOLOTL CARE GUIDE | Housing, Feeding, & Tank Mates | Ambystoma mexicanum
[tags]Mud Puppy, Waterdogs, Red Salamander, Japanese Giant Salamander, StrangeLookingFish, Axolotl, amphibian, strangefish, strangeanimal, Ambystoma, mexicanum[/tags]