The Aquatics tanks as they are constructed and function as we've seen so far, prevents any interaction with anything existing outside the tank. Think of the 'lagoons' as upside down JWE Aviairys.What do you mean "at this time"
"At this time" literally means at this time, until Frontier changes how they are constructed and add dynamics to interact with the outside world, it will not be possible. Just remember it took 2yrs and a new game to get the Pteranodons and flying reptiles to exist and interact with the world outside the Aviary.