What trait allows *S. glanis* to establish itself rapidly in new systems?

Highly plastic evolutionary toolkit

The species' ability to be successfully moved and established outside of its historical Eurasian range, provided habitat structure and temperature are suitable, points toward a high degree of inherent biological flexibility. This rapid establishment, seen when introduced to new environments like Western Europe, suggests that the necessary components of its successful blueprint—including its physiological mechanisms for aging, its reliance on advanced sensory perception, and its broad dietary capacity—were already highly plastic. This inherent plasticity allows for rapid colonization in new locations without needing extensive periods of slow genetic mutation and natural selection to acquire the required adaptations for survival.