F.A.T.H.E.R. runs a complete analysis of the data log and discovers that the problem was an intelligent virus. He gets corrupted by it and puts C.O.R.E. in danger. At the same time, the virus makes your fisheries produce rotten fish. Set up a trade route (if you have not already) to import additional Functional Food and rice/Health Food (Eco island) or Super Flavour/Convenience Food (Tycoon island) to feed your lab assistants and employees. (Note: If possible, set up a trade route between you and Dr. Bartok to sell her rotten fish. You will get 90 credits per ton. A good way to make extra money. If you need to construct a new ship to do this, build a submarine base and order another T38 Ocean Glider, buying 30 Carbon from Prof. Devi as required.) Dr. Bartok is deemed an enemy by F.A.T.H.E.R. and sets up a warehouse on the edge of the C.O.R.E. island. She will give you a special data log to help you create an Anti Virus and a mission to fix your fisheries. As soon as this is done, fetch the fish you may have stored in your Ark (if you followed the advice in the walkthrough for the previous mission) to quickly replenish your supply, please your citizens and receive a nice tax rise.
Beware: F.A.T.H.E.R. will attack your ships and destroy your data log if you get caught before you can unload your data log into your warehouse. Give his coastline a wide berth while you carry the data log.
If a (Standard model) Ark is not present in the middle of the map, situated on top of an underwater island, then you won't be able to deliver the Repaired Data Log to Prof. Devi. Restarting the mission helps repair the glitch.