Best Koi Pond Filter: Review and Buying Guide 2023

Koi are colorful varieties of Amur carp which are kept for ornamental or decorative purposes in a water garden or koi ponds. Different varieties of ornamental koi are available in the pet market. They are originated in Japan in the 19th century. Koi can grow up to 36 (91 cm) inches in length with a … Read more

Aquatic Adaptation of Labeo rohita

Fish are the prime aquatic animals. Because only fish have evolved there in the aquatic environment with origin. The origin and development of any other vertebrate species have not been completed in the aquatic environment. Various changes have been made in the anatomical and physiological functions of fish for successful adaptation to the aquatic environment. … Read more

Swimbladder: Structure, Types, Modifications and Functions

The sac-like structure between the intestines and the kidneys of most fish is called a swimbladder. However, many times it is also called gas or air sac. It contains a mixture of carbon dioxide (CO2), oxygen (O2) and nitrogen (N2) gases. With the exception of a few areas, almost all bony fish contains swimbladder. The … Read more

Arterial System of Scoliodon

Scoliodon is an Indo-Pacific species which belongs to the family Ceacharrhinidae under order Carcharhiniformes of Class Elasmmobranchii. It has an elongated and spindle-shaped body which tappers at the end. The head is dorso-ventrally compressed with laterally compressed trunk and tail. The mouth is situated on the ventral side and the entire body is covered by … Read more

Growth Rate and Survival Rate of Fishes

Significant parameters of intensive study of fish biology are observation of growth. It provides ideas about the health of single fish and the population. The growth of an organism can be defined by changes in body size over time. Since the age and growth of the fish are closely related, the age and growth rate … Read more

Strongyloides stercoralis: Morphology, Life Cycle and Pathogenesis

Strongyloides stercoralis is a nematode parasite which belongs to the family Strongylidae under order Rhabditida. It is a human pathogenic parasite which causes disease, known as strongyloidiasis. The parasite is also known as threadworm causing infection with fecal contamination of soil or water.  It is rare in developed countries while in the developing countries, it … Read more