04/01/2015 12:03 EDT | Updated 05/31/2015 05:59 EDT

Another baby orca born to JPod

A baby orca spotted Monday in JPod is the fourth birth in three months sparking a mini baby orca boom in the population of endangered southern resident orcas.

Naturalist and researcher Jeanne Hyde was on board the boat with Capt. Spencer Domico watching J16 swimming with her three-month-old calf J50.

"We were assuming we had only the J16s," recounts Hyde.  

"And as they passed in front of the boat, I saw a small calf surfacing next to J16 and said, 'there's the baby.' But then J50 surfaced behind all the rest. That's when I told Spencer, 'I think there are two calves!"

Michael Harris, the executive director of the Pacific Whale Watch Association said it's a good sign.

J-Pod is certainly doing all it can to rebuild the ranks," he said. "The Southern Residents are a long way from being out of the woods — these calves too, but this is great news."

This latest addition brings the local population of southern resident orcas to 81.