Concerns have been expressed that the proposed widening and extending of Egypt's Suez canal will exacerbate the problems with non-indigenous species in the Mediterranean (http://www.theguardian.com/world/2014/nov/30/suez-canal-scheme-threatens-mediterranean-ecosystem-economic-activity). It is estimated that at least half of the current 700 alien marine species have arrived from the Red sea via the current link and the shipping 'improvements' will make further movement even easier. Already, some species such as the Nomad jellyfish, have disrupted fishing and tourism in the Mediterranean.
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