noun
- a condition in fish in which the tail fin is symmetrical, with the vertebral column ending at or before the base of the tail rather than extending into the upper lobe.
Usage: ichthyology; technical
Examples
- Most modern fish exhibit homocercy, with symmetrical tail fins.
- The homocercy of teleost fish represents an evolutionary adaptation for efficient swimming.
- In contrast to heterocercy, homocercy provides better hydrodynamic balance.
- Fish biologists study homocercy to understand tail fin evolution.