Shells from a long distance away?

[dave r]

It may well be that a climatological or biotopical change has allowed other species to recently move in Kenny, I know this has happened elsewhere. Some warm water species have been expanding their ranges Northwards. This has happened in other animals as well as molluscs. I am aware that the biology of the Sea of Cortez has changed dramatically of late with the top predators being the Humboldt Squid rather than sharks now, maybe this has had a knock-on effect further down the food chain.
Dave