What does a loaf of walnut bread and an octopus have in common? Nothing substantial, but an employee at U.K. based supermarket store Tesco seems to think they are similar.

A Tesco customer was surprised when he placed an online order for walnut bread - and instead received an octopus. Tesco sometimes replaces items that are out of stock with something similar when dealing with online orders

The customer, John Goodger, smelt something fishy when his package arrived.

He took to Twitter to vent his confusion, writing: "genuine Tesco substitution: Whole Octopus as an alternative to Walnut Loaf."

After Tesco realized their mistake, they cheerfully responded to Goodger and offered him a refund of 'a couple of squid'.

'This has ten-tickled us so much! Maybe the personal shopper was trying to be Billy the Squid?' the supermarket tweeted.

One user joked back, saying the octopus was poorly so only cost him a 'squid'.

Tesco said: "We must say we hope he's not poorly! Maybe we can send him a friend from the sea, hopefully then, he'll be as happy as can be."