"A couple of them were obviously nervous ... you know, you hear the word shark and people panic.''
A number of surfers were also advised, and a few chose to leave.
Others kept on surfing and "enjoying the waves''.
"The IRB (inflatable rescue boat) sighted the shark again and confirmed it was just a little wee one, just about a metre long.''
Lifeguards did not know the breed of shark, and it has not been sighted since, she said.
Miss Bray believed a similar incident occurred on Sunday, but could not confirm details.
It was national policy to close the beach following a sighting, she said.
"Like any beach, it happens here on the rare occasion. They're usually small and mind their own business.''