A documentary exploring the lives of Bermuda’s humpback whales is to get a third screening after two previous showings sold out.

Andrew Stevenson’s If They Were Us, which screened at the Bermuda Underwater Exploration Institute last month, will be shown one more time at Speciality Cinema in Hamilton at 7pm tomorrow.

The film examines how the ocean unites humans with nature and highlights conservation successes.

It is narrated by Mr Stevenson’s daughters, and viewers of all ages are invited to “rediscover our bond with nature and find hope in the face of ecological challenges”.

Mr Stevenson said of his latest work on humpback whales: “As a father and researcher, I’ve spent 20 years on the water around Bermuda with my daughters, witnessing the social complexity and resilience of the humpback whales.

“My third film on humpbacks is my way of sharing that wonder and optimism, while reminding us of our responsibility and connection to the natural world.”

Mr Stevenson, a veteran researcher of humpback whales, said he has witnessed some exciting behaviour out on the water after bouts of difficult weather this season.

He said: “After three weeks of high winds and being shorebound, I finally had three eleven-hour days on the water over Easter with lots of humpbacks in what is now peak season.”

On Good Friday, he captured aerial footage of an all-male group of humpbacks.

“These males were not fighting over a female but generally showing off to each other, pectoral-slapping, breaching and chin-slapping, often with several whales doing this all at once. We were out there sitting quietly observing where the whales were and what they were doing.

“We knew there were a couple of whales to our north, some closer to our northwest, a singleton under the boat singing and two more some hundreds of yards off our bow.

“Then we saw a breach, followed by two more breaches from the same whale. The two whales off our bow started pec-slapping and moving rapidly towards the breacher.

“The singer under the boat stopped singing and joined the other two towards the breacher.

“Within a quarter of an hour, all the whales we had been observing around us congregated around the breacher and within another half hour there were fifteen whales, all males, showing off to each other in what I have observed many times before — a fraternity of males.”

Mr Stevenson said that on Saturday, he witnessed a competitive group of males fighting over a female, with similar behaviour.

He added: “On Sunday, we had another competitive group, another singer under the boat and a mother and calf in shallow water.”

• Tickets are available on Speciality Cinema’swebsiteand in-person from the cinema