Holomictic references the most common type of lake which turns over at least once per year (as opposed to meromictic lakes which are constantly stratified). This mixing is an important process for maintaining fish and aquatic communities by distributing nutrients and oxygen throughout the lake before stratification occurs again. There are four categories of holomictic … [Read more…]
A homocercal tail is a caudal fin composed of two lobes of equal proportion. Homocercal tails are the most common caudal fin type in fish but can come in many symmetrical shapes. A homocercal tail is contrasted with a heterocercal tail which has unequal lobes.
A heterocercal tail is a caudal fin composed of two asymmetrical lobes. Often, such as the case in many sharks, the vertebral column passes through the upper lobe, making it the larger of the two lobes. A heterocercal tail is contrasted with a homocercal tail which has equal lobes.
Habitat, is simply, the location where a fish lives. It applies to any and all life stages. It is where a fish survives, feeds, grows, and reproduces. The habitat of a fish depends on the species, from wetlands, to rivers, to coral reefs, to lakes, and more. Most fish do require well-oxygenated water. But, there … [Read more…]