Warning signs remain posted at Alii Beach Park in Haleiwa this morning after a shark was seen in the area again.
The shark, which witnesses told city lifeguards may be the same one feeding off fish near the shore line, was sighted just after 10 this morning.
Lifeguards are verbally warning people.
However, the beach park remains open.
Lifeguards spotted a 13- to 15-foot shark at about 11 a.m. Thursday, according to Emergency Medical Services.