Hawaii Marine Life Guide

Hawaiian Fish

Hawaii's reefs feel like a moving color chart, with butterflyfish, wrasses, tangs, turtles, rays and other marine life passing through coral heads, tide pools and sandy shallows. This guide helps you recognize the fish and ocean animals often seen in Hawaiian waters, while keeping reef safety and respectful wildlife viewing in mind.

Hawaii Fish and Marine Life Guide

Hawaii's surrounding ocean is home to colorful reef fish, marine mammals, sea turtles, rays, sharks, octopuses, crabs and many other marine animals. Shallow coral reefs, tide pools, sandy bottoms and deeper offshore waters all support different species, each with its own colors, body shape, feeding habits and survival tricks. Visitors can also see the broader Hawaii ocean life guide for more marine background.

This guide introduces many fish families and marine animals associated with Hawaiian waters. Some are easy to notice while snorkeling near coral heads, while others hide in reef cracks, rest on the ocean floor, travel offshore or appear seasonally. Before going in the water, review Hawaii beach safety tips and check the conditions for the beach you plan to visit.

Reef Fish in Hawaii

Hawaii's reefs are known for bright butterflyfishes, damselfishes, wrasses, surgeonfishes and unicornfishes, triggerfishes and parrotfishes. Many reef fish stay close to coral, rocks or sand where they can feed, hide and avoid larger predators.

Color and behavior matter on the reef. Some fish blend into coral or rubble, while others use bright markings to signal, defend territory or confuse predators. Parrotfishes and surgeonfishes also help reef health by grazing algae, while cleaner fish remove parasites from other fish.

Predators, Bottom Dwellers and Camouflage Experts

Hawaii's marine life includes many skilled predators. Barracudas, jacks, groupers, lizardfishes, trumpetfishes and cornetfishes use speed, ambush tactics or stealth to catch prey. Eels often hide in reef crevices, while scorpionfishes rely on camouflage and venomous spines for protection.

Other animals live close to the ocean floor. Rays, sea cucumbers, crabs, goatfishes and bonefishes use sand, mud or rubble habitats for feeding and cover. Together, these bottom-dwelling species show how much is happening beyond the bright reef surface.

Marine Mammals and Sea Turtles

Hawaiian waters also support important marine mammals and reptiles. Spinner dolphins, humpback whales, Hawaiian monk seals and sea turtles are among the animals visitors often hope to see. Some are seasonal, while others live in Hawaii year-round.

The Hawaiian green sea turtle, or honu, is the most commonly seen sea turtle in the Islands. Hawaiian monk seals are rare and protected, so people should always keep a safe distance. During winter, humpback whales visit Hawaiian waters to breed, give birth and nurse their young. Related pages include honu, dolphins in Hawaii, Hawaii sharks and Maui whale watching tours.

Coral Reefs and Ocean Habitats

Coral reefs help support much of Hawaii's nearshore marine life. Reef structures provide shelter, feeding areas and nursery habitat for many fish and invertebrates. Coral is fragile, and even brief contact from hands, fins or gear can damage living colonies.

Lava rock, sandy channels, tide pools, offshore ledges and deeper open water also support different animals. A calm reef lagoon can feel very different from a rocky shoreline, black sand beach or offshore dive site. For more ocean background, related pages include the Hawaiian coral reef, Hawaiian lava and Hawaii beach sand composition.

Respecting Hawaii's Marine Life

Marine animals are best enjoyed with patience and distance. Snorkelers and swimmers should avoid touching fish, turtles, coral, octopuses, monk seals or other wildlife. Never feed fish, stand on coral or chase animals for photos.

Before entering the water, check surf, wind, visibility and currents. Choose lifeguarded beaches when possible, snorkel with a buddy and stay close enough to shore or the boat to return safely. Beach guides such as Hawaii beaches, Oahu beaches, Maui beaches, Kauai beaches and Big Island beaches can help visitors understand different shoreline settings.

If you want guided help, related activity pages include Oahu snorkeling tours, Maui snorkeling tours, Kauai snorkeling tours, Big Island snorkeling tours, Hawaii dinner cruises and Hawaii island tours.

Browse Hawaii Fish and Marine Animals

The directory below includes Hawaiian reef fish, offshore fish, marine mammals, sea turtles and other ocean animals. The cards introduce each group's appearance, habitat, feeding behavior, Hawaiian names when available and where they may be seen in Hawaii's waters.

Guide Directory

Explore Hawaiian Fish

Browse related topics in this Hawaiian Fish guide.

Angelfishes

Angelfishes bring bright color to Hawaii's shallow reefs, often gliding close to coral and rocky ledges. They look a lot like butterflyfishes at first, but angelfishes have a small spine on the gill cover that helps set them apart.

Barracudas

Barracudas have a look you do not forget: long silver bodies, sharp teeth and a still, watchful way of hanging near the reef. In Hawaii, the Great Barracuda is called kaku and is usually seen alone or in small groups.

Bigeyes

Bigeyes are red reef fish with large reflective eyes that help them see in dim water. In Hawaii, they are called 'aweoweo, meaning “glowing red,” and are often found near caves, ledges and reef shadows.

Blennies

Blennies are small reef fish with big eyes, long bodies and a curious little face that makes them fun to spot. In Hawaii, they are called pao'o and often hide in tide pools, reef cracks and shallow rocky areas.

Bonefishes

Bonefishes are sleek silver fish that move fast across Hawaii's shallow sandy flats, lagoons and calm coastal waters. In Hawaiian, they are called 'o'io and are well known for their speed, strength and many small bones.

Boxfishes

Boxfishes look like little armored reef fish, with hard shell-like bodies and small fins that move them carefully through the water. In Hawaii, they are called pahu, meaning “box,” a name that fits their unusual shape.

Butterflyfishes

Butterflyfishes are some of the easiest reef fish to notice in Hawaii, with bright colors, slim round bodies and bold markings near the eyes. They often move close to coral reefs, where snorkelers and divers can watch them feed and weave through the reef.

Chubs

Chubs are sturdy, oval reef fish often seen around Hawaii's shallow rocky shorelines. Known in Hawaiian as nenue, they graze on seaweed and algae and are best watched without feeding.

Crabs

Crabs bring quick little movements to Hawaii tide pools, reefs and rocky shorelines. Nearly 200 crab species live in Hawaiian waters, using hard shells, claws and hiding places to feed, communicate and stay safe.

Damselfishes

Damselfishes are small, busy reef fish often seen hovering above coral heads in Hawaii. Many have bright colors or bold markings, and some defend tiny algae patches like little reef gardens.

Dartfishes

Dartfishes are shy, slender reef fish that hover above sandy patches and disappear into burrows when they feel threatened. In Hawaii, the Fire Dartfish and Indigo Dartfish are the two species found in local waters.

Dolphins

Dolphins are intelligent, social marine mammals that move through Hawaii's waters in groups, using whistles, clicks, body movement and echolocation. Bottlenose dolphins and spinner dolphins are among the species visitors may hear about most.

Eels

Eels are secretive fish that often hide in reef cracks, rocky holes or sandy bottoms around Hawaii. Known in Hawaiian as puhi, they include moray eels, conger eels, snake eels and garden eels.

Filefishes

Filefishes are narrow reef fish with small mouths, sharp teeth and a raised dorsal spine that can stand up when they feel alert. In Hawaii, they are called 'o'ili, a name tied to the idea of something coming up.

Goatfishes

Goatfishes are easy to recognize by the two whisker-like barbels under their chin. In Hawaii, many are seen sweeping sandy bottoms for hidden food, with names such as weke, 'oama and moano.

Groupers

Groupers are powerful reef predators with thick bodies, large mouths and a patient hunting style. In Hawaii, the endemic Hawaiian Black Grouper is known as hapu'u and is often associated with deeper reef areas.

Hawkfishes

Hawkfishes are watchful reef fish that perch on coral heads and rocky ledges, waiting for small prey to pass close by. In Hawaii, they are called piliko'a, meaning “coral clinging.”

Jacks

Jacks are fast, powerful fish often seen near reef edges, channels and deeper blue water around Hawaii. Adults are called ulua, while younger jacks are called papio, names many local fishers know well.

Lizardfishes

Lizardfishes are camouflaged bottom hunters that rest quietly on sand, rocks or coral rubble before making a sudden strike. In Hawaii, they are called 'ulae, and 16 species live in local waters.

Monk Seals

Hawaiian monk seals are rare, endangered marine mammals found only in the Hawaiian Islands. When one rests on the beach, it needs quiet space, respectful distance and a clear path back to the ocean.

Moorish Idols

Moorish Idols are graceful reef fish with bold black, white and yellow bands and a long trailing fin that looks like a ribbon in the water. In Hawaii, they are called kihikihi and are often seen gliding near reefs and lagoons.

Needlefishes

Needlefishes are long, slim surface hunters with sharp beaks and quick movement just below the water. In Hawaii, they are called 'aha, meaning “cord,” a fitting name for their thin bodies.

Octopuses

Octopuses are clever reef animals with eight arms, strong suction cups and amazing camouflage skills. In Hawaii, the Hawaiian Day Octopus, or he'e mauli, is the one snorkelers and divers are most likely to see.

Parrotfishes

Parrotfishes are colorful reef grazers with strong beaklike teeth used to scrape algae from rocks and coral surfaces. In Hawaii, they are called uhu, with young fish known as 'ohua and mid-sized fish as panuhu.

Porcupinefishes

Porcupinefishes are spiny reef fish that can puff into a round, hard-to-swallow ball when threatened. In Hawaii, they are called kokala and were sometimes honored as 'aumakua, or family guardian spirits.

Pufferfishes

Pufferfishes are defensive reef fish that can swell into a balloon shape when they feel threatened. In Hawaii, they are called makimaki and are known for bristled skin, strong jaws and toxic bodies.

Rays

Rays are graceful shark relatives with flat bodies, cartilage skeletons and wide fins that glide through Hawaiian waters like underwater wings. In Hawaii, they are known as lupe, meaning “kite,” and hihimanu, meaning “magnificent.”

Remoras

Remoras are unusual ocean fish with a suction disk on top of the head, allowing them to hitch rides on sharks, turtles, rays, whales, dolphins and even boats. In Hawaii, they are called omo and are also known as suckerfishes.

Scorpionfishes

Scorpionfishes are camouflaged reef predators that often sit still among rocks, coral and rubble. In Hawaii, they are called nohu, and many species have venomous spines that can cause a painful sting if touched or stepped on.

Sea Cucumbers

Sea cucumbers are slow-moving seafloor animals with leathery bodies, tube feet and an important cleanup role in Hawaii's reef and sandy habitats. In Hawaiian, they are called loli.

Sharks

Sharks are powerful ocean predators with sharp senses, replaceable teeth and an important role in Hawaii's marine food web. In Hawaiian, sharks are called mano, and for some families, certain sharks were honored as 'aumakua.

Snappers

Snappers are carnivorous reef and deepwater fish found in Hawaiian waters. Some, like onaga, 'opakapaka and 'ula'ula, are prized local food fish, while others live closer to reefs where divers may see them.

Squirrelfishes and Soldierfishes

Squirrelfishes and soldierfishes are red, big-eyed reef fish that hide in shadowed reef spaces during the day and hunt after dark. In Hawaii, squirrelfishes are called 'ala'ihi, while soldierfishes are called 'u'u.

Surgeonfishes and Unicornfishes

Surgeonfishes and unicornfishes are common Hawaii reef fish, often seen grazing algae or cruising near coral and rocky reef areas. Surgeonfishes have sharp tail spines, while unicornfishes have bony keels and, in some species, a horn-like forehead.

Triggerfishes

Triggerfishes are sturdy reef fish with strong jaws and a clever locking spine used for protection. Hawaii's state fish, the humuhumunukunukuapua'a, is one of the best-known reef fish in the Islands.

Trumpetfishes and Cornetfishes

Trumpetfishes and cornetfishes are long, tube-mouthed reef predators that hunt with patience, stealth and sudden suction strikes. In Hawaii, both are called nunu or nuhu and are often seen gliding near reefs while stalking small fish.

Turtles

Sea turtles are among Hawaii's most loved ocean animals, often seen swimming near reefs, resting by rocky shorelines or basking on quiet beaches. The Hawaiian green sea turtle, called honu, is the turtle visitors see most often.

Whales

Humpback whales return to Hawaii each winter to mate, give birth and nurse their calves in warm Pacific waters. From December through April, their spouts, tail slaps and breaches make whale watching a special seasonal sight.

Wrasses

Wrasses are active, colorful reef fish that bring constant movement to Hawaii's coral habitats. Known in Hawaiian as hinalea, they include small hunters, plankton feeders and cleaner wrasses that groom other fish.

What kinds of fish can be seen in Hawaii?

Hawaii has many reef fish and marine animals, including butterflyfishes, angelfishes, wrasses, triggerfishes, parrotfishes, surgeonfishes, goatfishes, eels, rays, sharks and reef predators such as jacks and barracudas.

What is Hawaii's state fish?

Hawaii's state fish is the humuhumunukunukuapua'a, also called the wedgetail triggerfish or Picasso triggerfish. It is a colorful reef fish often seen in shallow Hawaiian waters.

Where can visitors see reef fish in Hawaii?

Reef fish are often seen at calm snorkeling beaches, protected bays, reef flats and marine life conservation areas. Always check ocean conditions first and avoid touching coral or wildlife.

Are there marine mammals in Hawaiian waters?

Yes. Hawaiian waters are home to dolphins, whales and the endangered Hawaiian monk seal. Humpback whales visit in winter, while several dolphin species and monk seals may be seen year-round.

Can I touch sea turtles, monk seals or reef fish in Hawaii?

No. Wildlife should be viewed from a respectful distance. Sea turtles and monk seals are protected, and touching or disturbing marine animals can harm them and may violate wildlife protection rules.