Weird Flakey stuff on tomatoe clown

[leeg]

Hi Guys,
any idea what this could be on my clown?
he was perfectly fine yesterday, now today he has some kind of white flakey stuff on him.
please help

 

[CameL]

Only saw this now, how is he doing today?

 

[RiaanP]

looks like lymphocystis
Heavy case of it.

 

[leeg]

Thanks for reply guys, he is doing 100%,
no more flakes on him, he is his old self
what causes it @RiaanP?