homocercal

• مصطلح أحيائي يُستخدم في علم أسماك لوصف نوع من الزعانف الذيلية تكون فيه الفصان العلوي والسفلي متماثلين، وهو ما يميز معظم الأسماك العظمية الحديثة.

A biological term used primarily in ichthyology to describe a type of tail fin (caudal fin) in which the upper and lower lobes are symmetrical, typical of most modern bony fish.

1. Tail symmetry in fishC2formalscientific

   Having a tail fin that is symmetrical externally, with the vertebral column ending before the tail tip, typical of most bony fishes.

   متماثل الذيل

   • The carp exhibits a homocercal tail, unlike sharks which have a heterocercal tail.
   • In ichthyology, homocercal tails are a key characteristic of teleost fish.
   • The homocercal structure provides efficient propulsion in many fish species.
   • Observations confirmed that the fossil fish had a homocercal caudal fin.