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28 Animals that are Blue (A to Z List with Pictures)

Jellyfish

Blue is the most popular color in the world. It’s one of the most neutral and pleasing colors to our eyes, so people from all over the world have it as their favorite color.

This color is also one of the most commonly seen colors out there. However, you don’t often see it on animals, so seeing animals that are blue can be exciting and interesting. Many people connect the color blue with poisonous animals, but as you’ll see from this list, this is not necessarily true!

List of Animals that are Blue

1. Agama

Agama
Scientific NameAgama agama
ClassificationReptile
Size12-18 inches
HabitatForest, rocks

In 1758, Linnaeus first described the agama as Lacerta Agama; the description was later changed to Agama agama, which we still use today. This reptile is found in most Sub-Saharan countries where it will feed on insects and other smaller animals. It’s particularly known for its beautiful blue body.

2. Betta Fish

Betta Fish
Scientific NameBetta splendens
ClassificationFish
Size3.1 inches
HabitatFreshwaters (Thailand)

The betta fish also called the Siamese fighting fish, is arguably one of the most beautiful fish species in the world. It is known for its aggressive character – so much so that in the past, people from Thailand used these fish to pit them against each other as they arranged fights. But this doesn’t take away from the beauty of this animal, which is often seen in aquariums all over the world!

3. Bluebird

bluebird
Scientific NameSialia
ClassificationBird
SizeUp to 12 inches
HabitatForests

The bluebird is one of the most common bird species in the world. It is found in mixed forests in the United States, Europe, and Asia. They also like open areas with some forestation. Up until the 1970s, bluebirds were one of the most common bird species but in the years after, their populations have begun to shrink significantly.

4. Blue Bottle Fly

Scientific NameCalliphora vomitoria
ClassificationInsect
Size9/16 inch
HabitatRural areas

The bluebottle fly is commonly found around most parts of the world. It strives in the warmer parts of the month where it mostly lives in rural areas. You’ll see that this type of fly will often have blue reflective materials on its back, which will make it appear as though it is blue with some parts of black and red.

5. Blue Crab

Blue Crab
Scientific NameCallinectes sapidus
ClassificationCrustacean
Size9 inch
HabitatOcean

The Callinectes sapidus, or the blue crab, is one of the most widely-eaten seafood in the United States, but also around the world. This crab has blue coloration on its body. With climate change well underway, the blue crab is deemed to be one of the few species in the world that will do well in the future.

6. Blue Dacnis

Scientific NameDacnis cayana
ClassificationBird
Size5 inches
HabitatForests

The blue dacnis is one of the most attractive bird species in the world. This bird lives in forests of Central and South America and it carries a blue and black coloration. Adult females, meanwhile, are green and blue.

7. Blue Glaucus

Scientific NameGlaucus atlanticus
ClassificationGastropod
VenomHigh
Size1.2 inches
HabitatOcean

The blue glaucus is one of the most interesting species on this list. It’s a relatively small animal that lives in deep waters, where it feeds on the previously-mentioned Portuguese man o’war. It can produce a more potent venom than the Portuguese man o’war, so it’s best to be careful of this little beauty!

8. Blue Iguana

blue iguana
Scientific NameCyclura lewisi
ClassificationReptile
Size5 feet
HabitatForests and coastal areas

The blue iguana is endemic to the island of Grand Cayman. Throughout its history, it has been pushed further into the forests by humans and their building of roads, which means that today, the iguana is an endangered species. The blue iguana is a herbivorous animal and is not harmful to humans at all.

9. Blue Jay

blue jay
Scientific NameCyanocitta cristatta
ClassificationBird
Size12 inches
HabitatMixed forest

The blue jay might be one of the most pleasing animals to the eye on this list. This beautiful bird is seen year-round in most states of the United States. It has a mostly blue body with some white and black patterns. It’s known for its loud but pleasant cry and its gregarious nature, as well as a relatively harmless attitude to its surroundings.

10. Blue Lobster (Blue Crayfish)

Scientific NameProcambarus alleni
ClassificationCrustaceans
Size5 inches
HabitatWaters of Florida

The blue lobster, sometimes also called the blue crayfish or the electric blue crayfish is endemic to the waters of Florida. It’s often kept in freshwater aquariums all around the world but particularly in the United States. The species is naturally blue, but it is also selectively bred so that the animals have an even more pronounced shade of blue.

11. Blue Poison Dart Frog

poison dart frog
Scientific NameDendrobates tinctorius “azureus”
ClassificationAmphibian
VenomMedium-High
Size2 inches
HabitatRainforest

The blue poison dart frog is a frog that is mainly found in rainforests, particularly in Suriname. This frog, as its name suggests, carries poison that it uses to kill or paralyze its prey. Unfortunately, this venom can also be highly toxic to humans and thus dangerous. Recently, scientists have been evaluating whether this poison could be used for medicinal purposes.

12. Blue-Ringed Octopus

Scientific NameHapalochlaena lunulata
ClassificationCephalopod
VenomHigh
Size5-8 inches
HabitatOcean

The blue-ringed octopus is one of the most venomous marine species. It can produce tetrodotoxin, which is a powerful toxin that can paralyze a human in a matter of minutes. So despite their small stature and fairly docile nature, the blue-ringed octopus is an animal to avoid.

13. Blue Sea Star (Linckia laevigata)

blue sea star
Scientific NameLinckia laevigata
ClassificationAsteroids
Size12 inches
HabitatOcean

This stunning blue creature can be found in shallow waters near coral reefs and other types of vegetation. There, it will strike a correlation with other species – some might even become parasitic to the blue starfish. Divers see this animal as one of the most stunning sights in the water.

14. Blue-Spotted Salamander

Scientific NameAmbystoma laterale
ClassificationAmphibian
SizeUp to 5 ½ inches
HabitatSwamps

The blue-spotted salamander displays a distinct black coloration with blue spots all over its body. This salamander is found in swampy areas where it has access to water. The tail comprises up to 40% of its body, which is an interesting fact about this animal.

15. Blue Tang

blue tang
Scientific NameParacanthurus hepatus
ClassificationFish
Size12 inches
HabitatIndopacific Ocean

The blue tang is one of the most beautiful fish in the world. This fish is entirely blue with black marks on its body and a yellow tail. It is believed that some of these fish are venomous while others don’t carry venom at all. Many fishermen use the fish as a baitfish, although its flesh is not very tasty, so it’s best to just adore the beauty of this animal.

16. Blue Thraoted Macaw

a blue throated macaw
Scientific NameAra ararauna
ClassificationBird
Size12 inches
HabitatRainforests and woodlands

The macaw is not entirely a blue species – rather, you’ll see that this beautiful parrot has yellow and blue patterns mixed on its body. Macaws are often seen and owned as pets in the West, but this bird is native to rainforests and woodlands of Central and South America, in particular.

17. Blue Whale

Blue Whale
Scientific NameBalaenoptera musculus
ClassificationMammal
SizeUp to 90 feet
HabitatOcean

The blue whale is considered to be the largest animal to ever exist. This whale has a long and slender body with a gray-blue color pattern. This large mammal is usually seen in deep waters a long way off the coast, so it’s not seen often. It’s also considered to be endangered, so we should keep a close eye on this species in the future!

18. Cobalt-Blue Tarantula

blue tarantula
Scientific NameCyriopagopus lividus
ClassificationArachnid
VenomMedium
Size5 inches
HabitatTropical rainforests

If you’re someone who adores spiders and tarantulas in particular, then you know that tarantulas come in different colors and shapes. The cobalt-blue tarantula is perhaps one of the most popular tarantula species in the world, mainly thanks to its vivid blue coloration that attracts a lot of attention.

19. Humphead Wrasse

Humphead Wrasse
Scientific NameCheilinus undulatus
ClassificationFish
Size6 feet
HabitatOcean

Last but not least, we have the humphead wrasse. It is the largest living member of the family of Labridae. They can reach up to 6 feet in size, with males usually being larger than females.

20. Indian Peafowl

Indian Peafowl
Scientific NamePavo cristatus
ClassificationBird
Size39 – 47 inches
HabitatDry lowlands

You’ll find the Indian peafowl, or the Indian peacock, all over the Indian subcontinent. It’s particularly common in drier areas. This bird can display its stunning wings of all kinds of colors when it wants to attract breeding partners. After all, it is still a peacock!

21. Indigo Bunting

Indigo Bunting
Scientific NamePasserina cyanea
ClassificationBird
Size8 inches
HabitatForests

Did you know that the indigo bunting can navigate by using stars? It moves around mostly at night when it uses stars to find its way. It’s also one of the most interesting bird species to look at, with an all-blue body which is typical for the males of this species, while females are almost entirely brown.

22. Portuguese Man O’War

portuguese man o war
Scientific NamePhysalia physalis
ClassificationHydrozoa
VenomHigh
Size6 inches (body), up to 165 feet (tentacles)
HabitatOcean

The Portuguese man o’war might seem like a lovely blue creature, but don’t be fooled by its appearance. On the surface, it will appear as a little jellyfish and might look like something like a toy, but underneath, it has extremely long tentacles that sometimes stretch to up to 165 feet! It’s also quite venomous, so it’s best to avoid it if you see one.

23. Little Blue Heron 

Little Blue Heron 
Scientific NameEgretta caerulea
ClassificationBird
Size29 inches
HabitatMarshes, swamps, rice fields

The little blue heron is one of the smallest animals from the genus of Egretta, only reaching the size of about 29 inches when adult. It’s known for its gray-blue coloration pattern with a bit more blue coloration coming around its beak. These herons are very common in most Central and South American countries.

24. Mandarinfish

Mandarinfish
Scientific NameSynchiropus splendidus
ClassificationFish
VenomMedium
Size3 inches
HabitatOcean

While the majority of fish are selectively bred so they achieve a more natural and vivid blue color, the mandarin fish is a rare exception. It has the capacity to produce stunning colors using its color glands, making it one of the rarest fish species to do so. It’s also quite hard to keep in aquariums, which is why it’s rare to see it as a pet.

25. Moor Frog

Scientific NameRana arvalis
ClassificationAmphibian
VenomMedium
SizeUp to 3 inches
HabitatMoors

The moor frog is not exclusively blue. Instead, only the males are colored blue when they are in the breeding season. Nonetheless, many people prefer the blue variation of this animal. Females tend to be brown-red.

26. Morpho

morpho
Scientific NameMorpho didius
ClassificationInsect
Size8 inches
HabitatTropical forests

The morpho is one of the most beautiful butterflies in the world. It belongs to the group of Neotropical butterflies that populate tropical forests of South America. Recently, the tropical forests of South America have been shrinking because of human intervention, which makes the Morpho ever more endangered.

27. Sinai Agama

Scientific NamePseudotrapelus sinaitus
ClassificationReptile
Size7 inches
HabitatSinai desert

We’ve already featured the animal called agama on this list, but Sinai agama is a different species. It’s also an all-blue animal that is mostly found in the Sinai desert and other regions around it. To be more precise, the males of this beautiful reptile usually display a blue coloration while the females are gray or yellow.

28. Turquoise Dwarf Gecko

Lygodactylus williamsi
Scientific NameLygodactylus williamsi
ClassificationReptile
Size31 inches
HabitatKimboza forest (Tanzania)

The turquoise dwarf gecko, or the Lygodactylus williamsi, is one of the most endangered species in the world. It is only found in about 8 square kilometers of rainforest in Tanzania, so their habitat is pretty limited. It has a typical light-blue body, which has led some people to call it the electric blue gecko.

Conclusion

There are many animals that are blue in this world. Some are larger than others, while some are also more poisonous. There is great variety with blue animals and hopefully, you’ve seen some of the most interesting blue species that nature has to offer.

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