The chromosomal inversion of the alpha or beta allele in C. frigida produces a distinct difference in adult size. Individuals homozygous for the alpha allele are physically larger and more developed. They benefit from the physicality with increased longevity and increased fecundity. However, these individuals have 2–4 days more in their developmental phases to grow to such an extent. These may be precious days that the seaweed bed is washed back into the ocean, killing the C. frigida. On the other hand, individuals homozygous for the beta allele are physically smaller. They benefit by growing into their adult phase faster, but have more trouble finding receptive mates.
