Snail evolution observed over the last 20 years in the Gulf of Maine

https://www.earth.com/news/sea-snails-evolved-defenses-against-invasive-predators/
Over the last 20 years, the Gulf of Maine
has turned into a hotspot for invasive
species, many of which arrive in ship
ballast water.  These invaders – and the
changing environmental conditions that
favor them – have reshaped coastal
ecosystems, including tidal snail
populations.
A recent study has examined how two
common snail species (Nucella lapillus
and Littorina obtusata) have evolved in
response to a major predator: the
invasive green crab (Carcinus maenas).
The key finding is that snails have
developed thicker shells, reflecting a
shift from short-term, plastic defenses
to more durable, genetic adaptations.
...
The papr is here
https://www.science.org/doi/10.1126/sciadv.adr6947
Evolution in changing seas: The loss of
plasticity under predator invasion and
warming oceans