The difference between saltwater and freshwater fish is that saltwater fish need to prevent hyponatremia and freshwater fish need to prevent dehydration. This is because water tends to move from a place that has a lesser concentration of salt to one that has a greater concentration of salt.Know More
In saltwater fish, there is more salt in the water than in their bodies. To compensate, the fish need to excrete much of the salt they ingest. Some have gills that can remove the salt from the water and excrete it.
Freshwater fish get salt from their food and excrete great amounts of urine. Their kidneys are also good at retaining salt.Learn more about Fish
There are no clear identifying features of saltwater fish compared to freshwater fish. The main difference between saltwater fish and freshwater fish is the regulation of salt and water in their bodies, which happens on a cellular level.Full Answer >
Freshwater fish live in rivers and lakes with very low salt levels, and saltwater fish live in seas and oceans that contain high levels of salt. The level of salinity in a fish's environment determines the type of fish it is. Common freshwater fish include trout, bass, salmon, and catfish. Most tropical, exotic and aquarium fish are freshwater fish.Full Answer >
The difference between the Dover sole fish and the lemon sole fish is that lemon soles have rounder bodies and lighter coloration on their dark side (the side without the eyes). Both soles have clean-tasting, slightly sweet flesh and are very popular in a range of seafood dishes, according to the Fine Seafood Company. They are interchangeable in most recipes.Full Answer >
Male Jack Dempsey fish are significantly larger than the females and boast slightly longer fins. The brilliant pattern of metallic spots on males is also more colorful than the pattern found on females. The tail, anal and dorsal fins of males are pointed, but the fins of female fish are slightly rounded.Full Answer >