The concept of "most fit for life" is subjective and depends on the specific environmental conditions and factors considered. While certain species may have specific adaptations that provide advantages in certain environments, no species is universally "most fit" across all possible scenarios.

Evolution operates on the principle of differential survival and reproduction. In any given environment, individuals that possess traits that increase their chances of survival and successful reproduction will have a higher fitness compared to those without those traits. This can vary depending on the ecological conditions and selective pressures present.

For example, in a cold climate, individuals with thick fur or the ability to store fat may have higher fitness, while in a desert environment, the ability to conserve water or tolerate high temperatures might be more advantageous.

Similarly, the concept of "equal chance" in terms of fitness is also relative. Evolution occurs over generations, and the outcomes depend on the interactions between individuals, populations, and the environment. While all individuals may start with a similar potential, genetic variation, environmental pressures, and random events can lead to differences in fitness over time.

In summary, there is no single species that holds the title of "most fit for life." Fitness is a dynamic concept heavily influenced by environmental factors, and what constitutes fitness can vary widely among species and circumstances.