The primary differentiating feature between these two groups is that osteichthyes have a jaw. Moreover osteichthyes have a skeleton made of bone,... View Article
Operculum is usually found only in bony fishes. Also Read: Fish Life Cycle: Introduction, Life Cycle, FAQs Fish Skeletal System - General... View Article
One of the key features of the superclass Agnatha is that it lacks jaws. Furthermore, paired fins are usually absent and the skeleton is made of... View Article
Fish have kidneys which help remove waste from the blood. Alternatively, small quantities of wastes also diffuse through the gills and into the... View Article
Lichens are not inherently toxic to fish. But it is important to understand that lichens are not normally aquatic or found freely in water. Also... View Article
In general, fish die due to a number of factors such as algal bloom, sustained increase in water temperature or drought. These cause the oxygen... View Article
From an evolutionary perspective, whales evolved from four-legged, even-toed ungulate ancestors which lived on land about 50 million years ago.... View Article
Fish that are found in marine ecosystems have their internal osmotic concentration lower than the surrounding seawater. This means they tend to... View Article
Fish require osmoregulatory mechanisms in order to survive their environment. For instance, most marine bony fish are osmoregulators while most... View Article
Fishes as well as aquatic mammals such as whales and dolphins do have tear ducts. This is because the eyes of these animals are perpetually wet... View Article
Fish do not emit an audible scream when in pain. However, neurobiologists have recognized that the nervous system in fish can comprehend and... View Article
The answer to this question depends on the type of fish in question - for instance, freshwater fish don’t drink as they can absorb all the... View Article
There are fish that may eat lichens, but it is important to understand that lichens are not freely found in water or on ice. Instead, they are... View Article
Fish do not release nitrite. They release waste in the form of ammonia. Also Read: Fish Life Cycle: Everything You Need to Know Discover... View Article
