Marine biologist Alan Deidun is tomorrow delivering the lecture ‘Aliens in our seas – is there cause for concern?’ as part of Din l-Art Ħelwa monthly lectures.

Ninety per cent of all global trade is affected through our seas.

Our increasing reliance on maritime trade has resulted in a greater endeavour to increase connectivity between different hubs and ports, mainly through the opening of canals and also through the commissioning of ever larger cargo carriers.

This has resulted in an increasing number of new marine arrivals to busy waterways such as the Mediterranean, which is serviced by the newly-enlarged Suez Canal.

While many view these newcomers simply as esoteric additions to our marine assemblages, others are more cautious as the ecological impacts of some of these newcomers are revealed.

■ The talk is being held tomorrow at Din l-Art Ħelwa premises at 133, Melita Street, Valletta, at 6.30pm. Entrance is free and seating is on a first-come, first-served basis.