Blue Ringed Octopus | Hapalochlaena lunulata
(by Luko Gecko)

Blue Ringed Octopus | Hapalochlaena lunulata

(by Luko Gecko)



Blue Shark | Prionace glauca
(by JeffBHester)

Blue Shark | Prionace glauca

(by JeffBHester)



Blue Dragon Nudibranch | Glaucus atlanticus
(by billunder)

Blue Dragon Nudibranch | Glaucus atlanticus

(by billunder)



Eastern Blue Devil | Paraplesiops bleekeri
(by billunder)

Eastern Blue Devil | Paraplesiops bleekeri

(by billunder)



Blue Shark | Prionace glauca
(by JeffBHester)

Blue Shark | Prionace glauca

(by JeffBHester)



Blue Ribbon Eel | Rhinomuraena quaesita
(by Kirsty Faulkner)

Blue Ribbon Eel | Rhinomuraena quaesita

(by Kirsty Faulkner)



Blue Spotted Stingray | Neotrygon kuhlii

“Since it is active in the daytime, divers often see the beautifully colored blue-spotted stingray on coral reefs. It is most often spotted lying on sandy patches under coral heads and rocks. Often, its blue-striped tail sticks out and gives away its hiding place. Large, bright blue spots cover the disk, which is greenish brown. Like all stingrays, it has a venomous spine on its tail. As the tide rises, blue-spotted stingrays move in groups into shallow water to hunt for invertebrates such as mollusks, crabs, shrimp, and worms.” -

(by FrogfishPhotos)

Blue Spotted Stingray | Neotrygon kuhlii

Since it is active in the daytime, divers often see the beautifully colored blue-spotted stingray on coral reefs. It is most often spotted lying on sandy patches under coral heads and rocks. Often, its blue-striped tail sticks out and gives away its hiding place. Large, bright blue spots cover the disk, which is greenish brown. Like all stingrays, it has a venomous spine on its tail. As the tide rises, blue-spotted stingrays move in groups into shallow water to hunt for invertebrates such as mollusks, crabs, shrimp, and worms.” -

(by FrogfishPhotos)



Blue Oranda | Carassius auratus
(by JobK)

Blue Oranda | Carassius auratus

(by JobK)



Blue-Ringed Octopus | Hapalochlaena maculosa

“With its fascinating coloring and delicate curling arms, the blue-ringed octopus may be a beautiful creature, but this small cephalopod is also deadly. The blue-ringed octopus appears grey or beige with light brown patches when it is at rest, but when agitated its 50 or 60 bright blue rings appear and pulsate with color, as a warning. Inside the salivary glands of the blue-ringed octopus live colonies of bacteria that produce tetrodotoxin, the potent neurotoxin found in pufferfish and other animals. A bite from a blue-ringed octopus can completely paralyze and kill an adult human in a matter of minutes. There is no known antidote. The octopus itself is not affected at all by the toxin-an evolutionary prerequisite for the symbiotic relationship that has developed between the blue-ringed octopus and the toxin-producing bacteria.” -

(Photo by Chris Reschman)

Blue-Ringed OctopusHapalochlaena maculosa

With its fascinating coloring and delicate curling arms, the blue-ringed octopus may be a beautiful creature, but this small cephalopod is also deadly. The blue-ringed octopus appears grey or beige with light brown patches when it is at rest, but when agitated its 50 or 60 bright blue rings appear and pulsate with color, as a warning. Inside the salivary glands of the blue-ringed octopus live colonies of bacteria that produce tetrodotoxin, the potent neurotoxin found in pufferfish and other animals. A bite from a blue-ringed octopus can completely paralyze and kill an adult human in a matter of minutes. There is no known antidote. The octopus itself is not affected at all by the toxin-an evolutionary prerequisite for the symbiotic relationship that has developed between the blue-ringed octopus and the toxin-producing bacteria.” -

(Photo by Chris Reschman)



Eastern Blue Devil | Paraplesiops bleekeri
(by billunder)

Eastern Blue Devil | Paraplesiops bleekeri

(by billunder)



Blue Shark | Prionace glauca \
(by fjparrillaperez)

Blue Shark | Prionace glauca \

(by fjparrillaperez)



Blue Ringed Octopus | Hapalochlaena
(by nadeika_k)

Blue Ringed Octopus | Hapalochlaena

(by nadeika_k)



Eastern Blue Devil | Paraplesiops bleekeri

“The Eastern Blue Devil Fish (Paraplesiops bleekeri) is also known as the Bleeker’s Blue Devil Fish and is one of the most beautiful fish species in Australia’s waters. It is a shy, secretive fish that is found inside caves and under ledges in inshore reefs in NSW estuaries and offshore waters from three to thirty metres. It occurs on the east coast from southern Queensland to Montague Island, but is most common in NSW from Sydney southwards to Ulladulla. Around Sydney it occurs in the more saline parts of estuaries, along the rocky coastline and around offshore islands.” -

(by Mick’s wet)

Eastern Blue Devil | Paraplesiops bleekeri

The Eastern Blue Devil Fish (Paraplesiops bleekeri) is also known as the Bleeker’s Blue Devil Fish and is one of the most beautiful fish species in Australia’s waters. It is a shy, secretive fish that is found inside caves and under ledges in inshore reefs in NSW estuaries and offshore waters from three to thirty metres. It occurs on the east coast from southern Queensland to Montague Island, but is most common in NSW from Sydney southwards to Ulladulla. Around Sydney it occurs in the more saline parts of estuaries, along the rocky coastline and around offshore islands.” -

(by Mick’s wet)



Blue-Ringed Angelfish (Pomacanthus annularis) and “intermediate phase” Moon Wrasse (Thalassoma lunare).
(by deecfc67)

Blue-Ringed Angelfish (Pomacanthus annularis) and “intermediate phase” Moon Wrasse (Thalassoma lunare).

(by deecfc67)



German Blue Ram | Mikrogeophagus ramirezi
(by loveflying924)

German Blue Ram | Mikrogeophagus ramirezi

(by loveflying924)