Species migrating between marine and fresh waters need adaptations for both environments when in salt water they need to keep the bodily salt concentration on a level lower than the surroundings, and vice versa.

Some other kinds of fish are, on the contrary, born in salt water, but live most of or parts of their adult lives in fresh water for instance the eels. These are known as anadromous fish, and include, for instance, salmon, trout, sea lamprey and three-spined stickleback. Many species of fish do reproduce in freshwater, but spend most of their adult lives in the sea. Sturgeon are found both in anadromous and fresh water stationary forms They also have well developed kidneys to reclaim salts from body fluids before excretion. Their scales reduce water diffusion through the skin: freshwater fish that have lost too many scales will die. Their gills must be able to diffuse dissolved gases while keeping the salts in the body fluids inside. When dealing with ponds and lakes, one might use the same basic models of speciation as when studying island biogeography.įreshwater fish differ physiologically from saltwater fish in several respects. This is primarily due to the rapid speciation that the scattered habitats make possible. To survive fresh water, the fish need a range of physiological adaptations.Ĥ1.24% of all known species of fish are found in fresh water. These environments differ from marine conditions in many ways, especially the difference in levels of salinity. We raise blue ram fry continuously about but that was our first and only attempt since at spawning embers.Tench are common freshwater fish throughout temperate Eurasia.įreshwater fish are those that spend some or all of their lives in fresh water, such as rivers and lakes, with a salinity of less than 1.05%. I think that’s cool everytime I look at that. We actually got our ember tetras to spawn and we raised ember terra fry into adult fish and they were added to our school. We call her granny and she finally passed away. School of 12 of them and we had one left until last night.

Our first fish for that tank was bloodfins. He has kept and bred fish since teenager but was all new to me. When I moved in with my boyfriend 3.5 yrs ago we got a 55 gal tank given to us and we set it up. They really bring a tank together and completes. We have rummynose, black, neon, ruby, lampeye, black neon and my favorite bloodfins oh and glow lights (I think I’m missing another one). We love tetras! We have some in every one of our tanks. Which one is your favorite tetra fish? Let us know in the comments section below… Tetra fish are a wonderful choice for community tanks due to their calm and peaceful temperament. Tetras are often recommended to beginners because they are hardy and setting up their tank is very straightforward.Īll they need is a standard tropical tank set up with basic equipment. The tetra group is a very exciting family of beautiful fish that have a distinctly unique appearance.Ĭoming in all colors of the rainbow, there is a color and pattern to suit everyone. Tetras will eat both frozen and dry foods, and will also gladly feast on live food.īecause tetras are usually kept in schools, you should get an automatic food dispenser, which will ensure that every fish gets enough food and also help you avoid overfeeding.įeed tetras twice a day, as much as they can eat in a period of around two minutes. They will happily feed on all sorts of foods, including granules and flakes. Just like in the wild, in the aquarium, these species are not picky with food. Tetras will eat everything they can get to, including insects that end up on the water surface and smaller freshwater organisms. Here you will find warm, well-oxygenated waters with an abundance of food. The well-known Amazon River, its tributaries, and countless estuaries have proven to be a very fertile environment for aquatic life. The majority of tetra types are native to tropical regions of South America. Because of their size, tetras can be kept in small aquariums, and finding compatible neighbors is not a difficult task.

Types of freshwater fish