Aquatic and Marine Biology

Hyla is a tree frog.

Except fish the rest can breathe on land also.

Prawn respires through gills.Gills usually consist of thin filaments of tissue, branches, or slender, tufted processes that have a highly folded surface to increase surface area

A swim bladder is a gas-filled organ that helps bony fish maintain buoyancy. It is absent in cartilaginous fish, which rely on other methods like large oily livers.

Bilateral symmetry means the body can be divided into two similar mirror-image halves along a central plane. This is a common feature in most fish species.

Gills are specialized respiratory organs that allow fish to absorb dissolved oxygen from the water. They are essential for gas exchange in an aquatic environment.

The gill filaments are the thin, vascularized structures attached to the gill arch. They provide a large surface area for efficient oxygen uptake.

The lateral line is a sensory system consisting of canals along the side of the fish. It detects vibrations and pressure changes in the water.

Fish fins are categorized into paired fins (pectoral and pelvic) and median fins (dorsal, anal, and caudal). Median fins are located along the midline of the body.

Pectoral and pelvic fins are paired fins. They are used for maneuvering, braking, and maintaining balance or position in the water column.

The caudal fin is the tail fin. It is the primary source of propulsion for most fish and acts as a rudder to steer and change direction.

The swim bladder is a gas-filled organ that allows fish to control their buoyancy. By adjusting the amount of gas, they can remain at a specific depth without swimming constantly.

Cartilaginous fish, such as sharks, retain high concentrations of urea in their blood. This helps them maintain osmotic balance with the surrounding seawater.

A fry is the term used for a young fish that has recently hatched from an egg and is beginning to feed independently.

Fingerlings are young fish that have grown to the size of a human finger. This stage follows the fry stage in the development of many fish species.