Bubble Nesting??

[BettaUK]

I purchased an lovely new male betta on saturday afternoon, came down stairs this morning and he has built a bubble nest even though he's on his own at the moment in quarantine.. Bit confused, any idea's why he's may have decided to bubble nest??

TIA
Lawrence

 

[Joby]

He's obviously very happy in his new home

A bubble nest building betta is a happy one!