- Education and Science»
- Life Sciences»
- Marine Biology»
- Marine Life
Top 10 Spectacular Blue Coloured Fish - A Visual Feast
Coloured Fish are attraction for everybody
We all like bright coloured fish. Colours arouse emotions and the bright colours clubbed with movements of fish in aquariums are quite soothing. That is why some of us are interested to have home aquarium or even visit public aquariums. Some go further for snorkeling to have a feel of the real world of fish in natural environment. All in all, fish are a great source of recreation for human beings.
The colours in fish have some other functions also. For example, recognition of species or even determining their sex. Sometimes, juveniles have different patterns of colours which help in differentiating them from their predators or sex competitors. Colours also help in blending with the environment, another technique to save from predators by taking shelter.
This time I have chosen blue colour and presented 10 spectacular fish which you may enjoy. Watching videos may further enhance that enjoyment.
#1. Blue Ring Angelfish
Belonging to Pomacanthidae family, the looks of this fish are quite stunning. Growing up to 45 cms, the fish can be recognised by the patterns it has on its body. The young ones have bluish black colour with curved bars which are narrow, white to blue. But as it grows the pattern changes to semicircular marking in the middle with violet colouring.
Blue-ringed Angelfish are found in the Indo-West Pacific, ranging from South Africa to north to Japan and south to Indonesia. They are found in singles or pairs in coral reefs and they feed on algae, fish, shrimps and corals. Initially, they are shy. So some hiding spaces in the tank are always required.
Enjoy some moments with Blue-ringed Angelish
#2. Blue Star Fish
Every body can recognise it due to its having five cylindrical arms with bright or light blue colour along with yellow tube feet. The colour it gets is from a pigment called linckiacyanin. Combination of pigments cause variation in colour shades. The fish is very sensitive to temperature as well as oxygen level. Growing up to 30 to 40 cms across, they have been found in coral reefs and sea grass beds of tropical waters of Indian and Pacific Oceans.
They act as scavengers and opportunistic predators and consume dead animals and small invertebrates.
3. Blue Ribbon Eel Fish
Beautiful thin body with high dorsal fins, the blue ribbon eel fish is active and elegant. It can live for about 20 years (not in captivity) and can grow up to one meter. Eel hides itself in rocks or reefs or even in sand and suddenly overpowers a fish or a shrimp as its food. What can be misconstrued as a show of anger or aggression, the ribbon eel is simply breathing by keeping its mouth wide open most of the time and not for striking.
They are quite vulnerable in captivity. They quite often tend to stop eating resulting in their dying soon. This may not be as a rule, as much depends upon the size of the tank, water flow and depth of the sand which may help in prolonging their lives in captivity.
#4. Blue Siamese Fighting Fish (Betta)
One of the popular fresh water aquarium fish, commonly called betta, is from Southeast Asia region originally. Formerly known as Siam (now Thailand), Cambodia and Vietnam had these in paddy fields. The name is also because of aggressiveness that males show to each other. It was also bred for fighting in Thailand since many for centuries.
Betta is known for brilliant colours and can breathe through labyrinth in addition to gills. This facilitates survival in stagnated waters and limited oxygen.With an overall length up to 7 cms it can survive in warm water, between 25-30 degree Celsius. The fish is carnivorous and can survive on crustaceans, mosquito larvae and even on larvae of other water born insects.
Enjoy Betta Swim and Song
#5. Map Pufferfish
Puffer fish family is another marine wonder. Map puffer is fish full of unique pattern of lines. Specially noteworthy are the black lines around eyes. About 60-65 cms in length, the map puffer has body covered with prickles.
With its presence throughout the Indo-West Pacific region, this, like others in the family, is deadly poisonous which acts as a deterrent to the predators. It is solitary, has four very strong teeth and survives on algae, sponges and invertebrates dwelling at the bottom.
#6. Yellowtail Blue Damselfish
The combination of jewel-blue body and yellow tail fading at the end makes it gorgeous. This unique colour combination mixed with non-aggressive nature puts yellowtail blue damselfish as a darling in home aquariums. It is found in Western Pacific and lives in coral reefs and sheltered lagoons.
Gaining a size up to 7 cms, the fish is omnivorous and accepts all varieties of food. Plankton, algae and fresh or frozen meaty food as also vegetables are all liked by it.
7. Blue Jelly Fish
This flat, average sized between 10 to 20 cms fish, is rather magical. It looks as if it is changing shape as it moves in the water. There are four mouth arms which are large in size and they are wrinkled. Jellyfish has the power of stinging using its long hairy tentacles. It may be painful. It lacks specialised systems like respiratory, digestive or central nervous system.
They are found in the north eastern part of Atlantic Ocean, including North sea. Most of the times they can be found in shallow water, mainly from April to July. Easterly winds can bring them to the shore creating problems for tourists in summer.
In aquariums they are major attraction for the tourists. Changing lights in the containers cause changes in the colour of jelly fish as the light reflects though media. Tourist remain glued to watch this as has been seen at Underwater World, Sentosa in Singapore.
#8. Yellow Bar Angelfish
Known as one of the largest among the angelfish, reaching about 50 cms in length, the yellow bar angelfish has a characteristically large yellow blotch on the violet blue body. Because of this yellow patch this marine fish has acquired the name of Half Moon Angel fish or Map Angel fish and many believe it replicates African continent.
It lives in the coral and rocky areas and found in Persian Gulf, northwestern Indian ocean and Red Sea. It likes food like sponges, algae, shrimp and anemones. Some have it home aquariums.
#9. Powder Blue Tang
This tropical marine oval shaped fish is also called powder blue surgeon fish and is known for its remarkable colours. The dorsal and pectoral fins are bright yellow and face has blue black marking which makes it very colourful. Mouth is small and pointed. It swims with its pectoral fins and the crescent shaped caudal fins add to its beauty. Whitish pelvic and anal fins make it multi-coloured
They show territorial and solitary behaviour and requires several hiding spots and swimming space in the tank. They are found in Indian Ocean and Western Pacific and they inhabit island coral reefs. They are primarily herbivores and like algae and small growths in crevices. They are monogamous.
Enjoy the view from bed room
# 10. Dwarf Gourami
Another popular fish because of its translucent body structure, Dwarf Gourami is also known as Colisa lalia. Red or dark orange stripe render it very beautiful. The fish originated from South Asia, though it is now widely distributed in aquariums. Averaging 4 to 5 cms, the males and females can be distinguished from each other either by blue and red alternating diagonal stripes in male and silver colour in female or also by dorsal fin which is rounded or curved in females but is pointed in the case of male.
They are carnivorous and prefer algae based or meaty foods including shrimps..