That was done in order to group the blocks geographically and make it easier to identify them. At the same time, the intention was to name possible discoveries after fish.
This scheme had been applied to Area C, where Cod represented an easy choice. Given that Ekofisk lay in Area E, however, the challenge was to find a fish name beginning with that letter.
Eel had already been used for a structure in block 2/7. Earl Walters at the Phillips office in London, came up with Ekofisk – without anyone objecting, even though the proper spellings should have been Echofish in English or Ekkofisk in Norwegian.
Eyewitness to the 1969 discoveryPhillips announces giant discovery