Category: Bony Fish


Underwater Fact 102

Mudskippers are able to breathe out of water by retaining water in their gill cavities and refreshing it as necessary. It is also thought that like amphibians, some species are able to absorb oxygen through their skin.

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A fish that is a rather untalented swimmer: Lumpsuckers use their pelvic fins to form a strong sucking disc that firmly holds the fish to the sea bottom.

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Underwater Fact 86

The beautiful Ribbon Eel (Rhinomuraena quaesita) changes colour and sex as it grows.

It is black with a yellow dorsal fin when young, but changes to bright blue with a yellow fin when it matures as a male.
These eels are the only protandic Moray Eels, which means that they change sex when they reach a body length of about 1.3 m (4 ft).
Then, the males turn yellow with white fins and become fully functional females.

Underwater Fact 71

Clownfish are protandric hermaphrodites that mature first as a male and then later change sex to become a female.

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Underwater Fact 64

The Mackerel Icefish is one of a group of species exclusively found in the Southern Ocean known as ‘white-blooded’ fishes. These fishes survive without the red oxygen carrying pigment haemoglobin in their blood cells that other fishes have. This means their blood is colourless.

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On Valentines Day there is to remember that Love exists in every life form on this planet and brings us all to where we are now.

One of those organisms lives in the tropical waters of the Atlantic Ocean:

The French Angelfish expresses a very special dedication to its partner. These fishes not just mate for life, they spend nearly every second with their spouse, traveling, hunting, sleeping and protecting their territories together.
Mature French Angelfish are rarely ever seen alone and if they are, it is usually because their mate has passed away because they do not ‘remarry’ following the death of a spouse.

Underwater Fact 60

Unlike the majority of fishes, most tuna are endothermic, which means that their body temperature is kept higher than that of the surrounding water. This enables more efficient muscle action and faster swimming even in colder water.

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Underwater Fact 48

The California Grunion is a small, iridescent fish that shows a unique spawning behaviour when actually coming out of the water to lay its eggs in the moist sand on the beach.

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Underwater Fact 47

Pufferfishes and Porcupinefishes are closely related and share the ability to inflate their bodies by gulping water into a highly distensible sac that opens off the lower part of the stomach. If this is not enough to deter predators, these fishes are also highly toxic.

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Underwater Fact 38

Flying fish swim fast towards the surface, opening out their fins as they break into the air. By rapidly beating their tails to gain and maintain speed they can remain airborne for more than 30 seconds, gliding for a distance of up to 100 metres.

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