- Larger head: Male trout usually have larger heads in proportion to their bodies.
- Stronger jaw: Male trout often have a more robust and muscular jaw compared to females.
- Kype: During spawning season, male trout develop a pronounced hook or extension of their lower jaw known as a kype.
- Larger pectoral fins: Male trout tend to have larger and broader pectoral fins.
- Brighter colors: During breeding season, male trout may display more vibrant colors and markings to attract females.
Female Trout:
- Smaller head: Female trout generally have smaller heads in relation to their bodies.
- Rounder body: Female trout often have a more rounded and fuller body shape compared to males.
- No kype: Female trout do not develop a kype.
- Smaller pectoral fins: Female trout usually have smaller and narrower pectoral fins.
- Less intense coloration: While female trout can also exhibit beautiful coloration, they may not be as vibrant as males during the spawning season.