The Spanish don't have a carrier that could operate an F18. I've not read anything about them being interested in a Growler either. They need to replace the 20 Hornets in the Canary Islands first then the remaining 70 Hornets later.
What's the Marte ER? If that's not an anti ship, air launched anti ship missile cleared for use of the Eurofighter then what is it?
Kongsberg is working to integrate the Naval Strike Missile on the Eurofighter platform, ditto Saab with the RBS15. In theory the Eurofighter can also carry Harpoon. It looks like there will be a number of options to choose from.
Jon Lake details how Eurofighter is developing the Typhoon...
Typhoon ECR is the SEAD variant.