German fast-food fish restaurant chain Nordsee could return to its roots and expand its business back into fishing and processing.

A merger with Bremerhaven-based Deutsche See -- Nordsee's exclusive supplier and former sister company -- could be one of the options, Robert Jung, CEO at Nordsee, told Welt.

"I could imagine that Deutsche See and Nordsee could become one company again someday," he said.

Nordsee was founded in 1896 as Deutsche Dampffischerei-Gesellschaft in Bremen. Deutsche See was part of the company for year, before being sold to management in 1998.

Today, Nordsee runs around 372 restaurants, reporting a turnover of around €360 million ($396.5 million) a year. Deutsche See is Germany's largest fish and seafood processor with sales of about €400 million ($440.6 million).

"We're already looking at getting closer to the source of our products," Jung said.

Takeover talks

However, Nordsee itself is currently the subject of takeover talks, with dairy giant Müller looking to offload its majority stake in the restaurant chain.

Müller and Heiner Kamps, who holds a 20 percent stake in Nordsee, have reportedly tasked investment bank GCA Altium to look for an investor.

Jung declined to comment on the planned offload by Müller, according to Welt.

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