Spinner Dolphin

Spinner Dolphin Pictures, Behaviors, Video and Information (provided by the Wild Dolphin Foundation)

The Hawaiian name for dolphin is nai'a, and refers to most all dolphins found here. Hawaiian Spinner dolphins are shaped and colored somewhat differently from other species of spinner dolphins.

With 13 species of toothed dolphins (nai'a) swimming in the tepid waters of Hawaii, the most common are the Hawaiian spinner, spotted (kiko), bottlenose and rough-toothed dolphins. Other often seen members of the dolphin family - although termed as whales (kohola)- are pilot and false killer whales.

Dolphins in Hawaii are commonly termed as "porpoise" by local folks, especially fishermen, who use the word "dolphin" when referring to the dolphin fish, or mahi mahi.

So called for their high, spinning leaps, spinner dolphins are known as playful, eager bow-riders throughout much of their range.

In certain areas in Hawaii, spinner dolphins are seen on an almost daily basis. Probably since the islands have formed, the Hawaiian spinner dolphins have come into nearshore daytime habitats along the west coast of Oahu. We have traced their occurrence in our area back at least 800 years.

Below are descriptions of daytime behaviors the acrobatic spinners frequently engage in. Pictures and videos were taken during our dolphin encounter tours.

Hawaiian Spinner Dolphins Stenella longirostris "Nai'a"
Size: 1.7 to 2.2 m, 75 kg.
Males slightly larger than females
Calves at birth: 77 cm
45 to 65 sharp-pointed teeth on each side of upper and lower jaw
Food: Fish (small deep-ocean species) and squid
Habitat: Mainly offshore
Range: Tropical, subtropical and warm temperate world ocean
Status: Population unknown, but common in most parts of its range. Substantial declines have occurred in the eastern tropical Pacific

To see the enlarged pictures, please click on the desired picture. Double click to open movies.

Spins
Spinner dolphins are famous for their fantastic jumps high out of the water. They can leap into the air and make as many as 7 complete spins before diving back into the ocean! Few dolphins are known to leap as high as the Spinner and except occasionally for the Clymene dolphin, no others spin. Why Do Spinner Dolphins Spin?
Note: Click on the picture to the right to see good spin video >>

Head-Over-Tail
This aerial behavior is probably the most energetic. While the spin is more like a top, this leap is a series of mid-air somersaults.
Note: Click on the picture to the right to see head over video >>

Head Slaps
This very young spinner has already learned a way to get mom's attention. Repeated head slaps send an acoustical message. Notice the pinkish underside, normally white, this could mean excitement or the product of vigorous slapping!

Tail or Peduncle Slaps
Often seen before a change in the pods behavior. Most often, immediately after we see this behavior, the pod will change its traveling direction. Tail slap video and how it looks from underwater. The dolphin is excited about his "play toy!"

Nose-Outs
Often seen before going into a rest mode, or when they seem to have interest in us. These, although still classified as aerial behaviors are the least energy taxing.

Fluke-up Dive
Dives with the tail (flukes)raised in the air seem to signaldeep dives. This a borderline aerial behavior - as it still happens above the water line, but is not very active.

Playing Behavior
Spinners often make "play-toys" of objects intheir environment. In our area, the tradewinds blow lightweight plastic grocery bags into the ocean. The dolphins drape these over their fins and pass them back and forth.
Note: Click on the picture to the right to see dolphins play video >>

Echelon Swimming
Newborn calves can be seen swimming near their mothers head for about a week before they swim nearer to her dorsal fin. This is termed as echelon swimming. Dolphins carry their young inside their womb and gestation is about 12 months for a bottlenose. The baby emerges tail first, and will suckle from its mother for up to 4 years.

Breathing
Oceanic dolphins have evolved a method of breathing without surfacing from the water. They blow a bubble when near the water surface and then quickly draw breath in when the bubble forms a bridge between the blowhole and the air, through the water. Dolphins breathe through theirblowhole located at the top of their head. A dolphin may empty and refill its lungs in less than a fifth of second. As the dolphin breathes the air leaves the blowhole at speeds of over 100mph. To sleep, a dolphin must shut down only half of its brain, as its breathing is under voluntary control.

Social Behavior
Spinner dolphin's pectoral flippers are used to steer them through the water, and they also use them to stroke one another, increasing the social bond between them. Dolphin "friends" may swim along face to face touching flippers. Dolphins that appear to be closely bonded may swim in synchrony, twisting, turning and swimming in perfect harmony together.

Whistles
Spinner Dolphins can be very noisy under and above water, click here to hear for underwater video and sound of spinner dolphins vocalizing and a signature whistle.

Snorkeling Hawaii

Snorkeling is a safe, easy, and enjoyable way to explore the world beneath the waves and is open to all ages and skill levels, from children to grandparents. Snorkeling is a great activity for the whole family. Snorkeling is certainly the easiest and least expensive way to enjoy Hawaii's underwater paradise. All you need is a mask, snorkel and fins. Many of Hawaii's top dive sites, particularly the shallow sheltered bays are just as rewarding for snorkelers as they are for divers.

There are many boat operators that offer cruises to popular snorkeling locations on each of the islands and some companies that offer kayaking snorkel trips. If you have never snorkeled before, it is a good idea to seek some instruction before you start and seek some advice on where to go snorkeling for the first time. A great place to begin is in a swimming pool, either at home before coming to Hawaii or at the hotel pool once you arrive. This way you will get used the mask and to breathing through your snorkel in a safe, controlled and confined environment.

Learning to Dive

Scuba Diving is a relaxing, action-packed and exciting sport that can be enjoyed by everybody. Evidence shows that people have been diving for thousands of years, either to hunt for food, seek out treasure, in the art of war or to simply observe the world beneath the waves. Have you always dreamed of diving down deep and exploring the oceans wonders, swimming with turtles or finding a long lost treasure? If you have you may want to consider scuba diving, but probably have some questions before you taking the plunge.

The first thing to consider before looking at dive courses is to determine how serious your interest is, will you be diving regularly or only once in a while. If you want try diving in Hawaii you do not need to get certified, as most companies offer introduction dives for first time divers. These are guided dives with a dive master who will accompany you to explore the reefs and the marine life. After taking one of these dives you will not be certified and can not go unsupervised, but this is a great way to decide if you want to continue diving and get certified.

If you decide that you do want to get certified, Hawaii is a great place to learn to dive and certification courses can usually be completed in three days. If you live in Hawaii there are also dive clubs that offer course over several weekends before completing certification. Another option for visitors with not much time is to contact a local dive company at home and complete all your class work before coming to Hawaii. Then once you arrive you only have the fun part to complete, your open water dives and you are certified.

Hawaiian Dive Sites

Hawaii has year round warm waters and has been a popular scuba dive location for years offering some of the best dive sites in the world. The islands of Hawaii each have their own personalities and characteristics and due to Hawaii's geographical isolation they each offer unique and exciting dive sites, and an abundance of endemic marine life. Select an island for more information on the available dive sites and recommended skill level required to dive at these locations.

Oahu - offers an excellent blend of dive sites that range from offshore lava formations and grottoes to plane and shipwrecks, many with large schools of colorful fish and green sea turtles.


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Maui - most of Maui's dive sites are located off the west coast and offers excellent diving for all levels of divers, including Molokini, Black Rock and Five Caves.

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Hawaii - most of the diving on the Big Island is off the leeward coast, with some excellent locations stretched all along the coast. As the coast is sheltered from the trade winds by the large mountains conditions tend to glassy with visibility around 100ft plus.

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Kauai - the Garden Island is known for its rugged and pristine diving. During the winter months large swells make the north shore generally inaccessible for diving, but during summer months and on calm days the north shore has some excellent locations.

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Ni'ihau - located 17-miles off the southwestern coast of Kauai, is home gigantic sea arches, the endangered monk seal, large pelagic fish and other rare species of fish. Ni'ihau has some amazing dive locations but is generally recommended for intermediate to advanced divers.

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Lanai - the dive sites in Lanai are best known for their lava formations which not only house a large variety of marine life but make for some amazing light effects. The lava formations range from archways, ridges, tunnels, pinnacles.

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Molokai - Along the entire South side of the island of Molokai lies the longest barrier reef in Hawaii. Seldom visited by divers, this natural sanctuary offers some of the best diving in the islands.

HawaiiScubaDiving.com

Check out HawaiiScubaDiving.com your complete one-source guide to diving in Hawaii, including dive companies, dive sites and everything else you want to know about diving in Hawaii. If you are looking to find a dive buddy, want to post a dive experience or have dive gear to sell, visit our community page.

The Hawaiian island chain is made up of 132 islands, though we generally only think of the eight main islands, Ni'ihau, Kauai, Oahu, Molokai, Lanai, Maui, Kahoolawe and Hawaii. Surrounded by the Pacific Ocean and located over 2400 miles from the nearest continent has created a unique underwater environment, in fact over 25% of marine is endemic to Hawaii.

The four most visited islands are Oahu, Maui, Kauai and Hawaii, they each have their own unique characteristics and dive locations. Lanai, Molokai and Ni'ihau are dived less frequently and offer some unique dives and marine life, although generally recommended for intermediate to advanced divers. If you are interested in diving off Kahoolawe you will need to charter a dive boat.

When you are not beneath the waves there are plenty of activities to keep you busy, why not try skydiving, visit a luau, go to the world's most active volcano or kick back and relax on a nice secluded beach. Visit our activity page for some suggestions of activities to participate when you are not diving and to arrange a lei greeting for when you arrive into the islands.