Fun Bicolor Damselfish Facts For Kids

Shivangi Pandey
Oct 20, 2022 By Shivangi Pandey
Originally Published on Sep 17, 2021
Edited by Luca Demetriou
Fact-checked by Sakshi Raturi
Read the following bicolor damselfish facts
Age: 3-18
Read time: 7.0 Min

Stegastes partitus, often known as the bicolor damselfish, is a Pomacentridae family bony fish that dwells near the seafloor on shallow rocky and coral reefs in the Caribbean Sea, the Gulf of Mexico, and off the coasts of Florida.

In Antigua, the shape is often white with a yellow band area between the two, as well as a yellow pectoral fin and a white tail.

On other islands, morphs may be almost all black/gray or almost entirely white. Although the forebody area is generally black, there are a number of light color variants towards the tail area, and the line between the two is sometimes ambiguous.

They aggressively defend their territories. It feed mainly on algae.

Over deep water solitary patch reefs of shallow coral reefs, found singly or in pairs. Do give a read to our articles on channel catfish and monkfish if you like reading about fishes.

Bicolor Damselfish Interesting Facts

What type of animal is a bicolor damselfish?

It is a fish in biology that feeds on algae.

What class of animal does a bicolor damselfish belong to?

Pomacentridae is a ray-finned fish family that includes damselfishes and clownfishes.

How many bicolor damselfish are there in the world?

The exact number of this family is not known.

Where does a bicolor damselfish live?

Bicolor damselfish (Stegastes partitus) is found in the ocean area of the Western Atlantic. In the Tropical Western Atlantic, adult coloration is very varied, with intergrading patterns. They're also found along the sea bed on shallow rocky and coral reefs in the Caribbean Sea, the Gulf of Mexico, and off Florida's coastlines.

What is a bicolor damselfish's habitat?

Damsels are found in habitats surrounding coral reefs, which include regions of dead coral, rocks, and man-made structures where algae are most likely to thrive. Stegastes partitus spend their time here being territorial and tending to their algal gardens.

The distribution spans the western Atlantic, from Florida to the Bahamas and the Caribbean, with a probable expansion to Brazil. They may also be seen off the coast of Mexico.

Who do bicolor damselfish live with?

Over deep marine solitary patch reefs of shallow reefs living alone, it may form groups of up to 20 additional individuals, with a dominant male at the group's head. If the alpha fish is challenged by a younger male and loses, the alpha area status is handed on to the winner.

To the marine depth of 80 ft (24.3 m), they graze on zooplankton in the marine column over coral reefs. It is territorial, aggressively defending a small area.

How long does a bicolor damselfish live?

They're known to live for five to six years. They are non-migratory. They eat zooplankton in the water column above coral reefs area and dive to depths of 80 ft (24.3 m) to feed.

How do they reproduce?

The seasonal spawning is at its peak from April to November. Females do not mate with males depending on size. Rather, female mate selection is influenced by male courting rates.

Bicolor damselfish mating sound description is notable. Males demonstrate their paternal qualities by the strength of their courtship displays, and females prefer spawning with actively courting males.

They will care for all the eggs placed in their nest, but they will occasionally consume younger bicolor damselfish larvae/eggs in order to focus their parental efforts on the more developed eggs that are closer to hatching.

Eggs might be stolen. Males will defend their territories aggressively, especially when they are guarding bicolor damselfish juvenile. Dawn is the time for spawning.

What is their conservation status?

For now, they are categorized as the Least Concern and are widespread in Western Atlantic. The bicolor damselfish is found all across the Caribbean, including the Cayman Islands.

Bicolor Damselfish Fun Facts

What do bicolor damselfish look like?

The bicolor damselfish adult, as the name indicates, includes a dark and a bright portion. Although the forebody is generally black, there are a number of light color variants towards the tail, and the line between the two often varies.

A golden patch might be present on the lowerside. On the head, there is a blunt nose, a small mouth, and large eyes.

Damsels in description have an equal distribution of black and white colors with a yellow segment separating both the final dorsal spine and the anal fin, although males lose color varies during mating.

Color differences occur based on geographic location, and juveniles usually differ from adults. The head and front of the body are usually dark brown-black, while the back is nearly white.

This part might vary considerably in this fish, where the dark hue ends and the bright color begins. On the lower side between the dark and bright regions, a golden patch may be visible.

It is dark and white with yellow segments.

How cute are they?

It's adorable as a small baby. The adult is 6 in (15.2 cm) long and has a deep-keeled shape.

As it ages, it more aggressively territorial. You expect to get a pretty tiny black fish with spots, but instead, you get a huge meaty fish that is brown or gray and quite common in appearance. It is common throughout Caribbean, including in the Cayman Islands.

How do they communicate?

In men, visual communication takes in the shape of a shift in body color. When attempting to attract the attention of a female, the male turns mainly black, with just the base of the tail site remaining white.

The tail, on the other hand, becomes dark to match the body's dark color. The change in color site indicates that a male is ready for reproduction (April-November). Bicolor damselfish mating chirp is noticeable.

How big is a bicolor damselfish?

Stegastes partitus species are usually less than 4 in (10 cm) in length.

How fast can a bicolor damselfish swim?

Although they are hardly champion water swimmers, post-settlement larvae and adults of damselfishes often attain average swimming speeds.

How much does a bicolor damselfish weigh?

The weight of a damselfish varies according to size, but the typical weight is around 2 lb (0.9 kg).

What are the male and female names of the species?

Adult males and females of this species do not have different names.

What would you call a baby bicolor damselfish?

It is known as juvenile bicolor damselfish (eupomacentrus partitus). Damsel fish are often targeted as youngsters and adults by giant groupers, snappers such as mutton snapper, and other large bony fish that feed on coral reefs.

What do they eat?

Bicolor damselfish diet is omnivores and it often eats flake-based meals, as well as live and frozen foods. However, it is critical to investigate the feed requirements of individual species. Certain species, for example, are herbivores.

Stegastes are similar to farmers since they tend to their food supplies, which are algae fields in their habitats. Stegastes partitus, on the other hand, has a distinct eating behavior and feeds on plankton/algae and worms. Stegastes partitus (bicolor damselfish) misidentification is common.

Are they dangerous?

Damselfish, as permanent food items, have evolved a variety of methods for recognizing the main danger. When a damselfish's skin is damaged, specific chemical compounds leak into the surrounding water, allowing them to smell the main danger.

Would they make a good pet?

Damselfishes are beautiful saltwater fish that is quite popular in the current saltwater tank hobby. Because of their non-large size, hardiness, and widespread availability, they are a popular choice of fish for new aquariums.

Damselfish have often been grown and kept successfully in aquariums. Bicolor damselfish care is easy. Other non-aggressive species, including clownfish, dwarf angelfish, tangs, dottybacks, and bottom-dwelling gobies, can be kept around in bigger tanks with most varieties of damselfishes.

Did you know...

Males do a frenzied marine mating dance in which they swim up and down in a column, generating a pulse that signals their vitality to possible females around. Females pick their mates depending on the males' mating dance speed and intensity.

How did the damselfish get its name?

Individuals have a sequence of spots on the body and immediately in front of the tail fin that fades or darkens during different phases of their life, which explains the common name. The head and front of the body are dark brown-black, while the back is almost white.

Do damsels kill other fish?

There are damselfishes that you may keep without endangering the lives and fins of other fish around. Damselfishes are aggressive and armed with a powerful bite and a tooth plate that may cause significant harm.

When they are young, this may not kill the other fish, but the persistent attack will. A damsel may be relentless, which means the other fish under assault has little time to relax and is agitated.

If it was not already stated, stress that it is a fish killer. When they are young, this may not kill the other fish, but their persistent attack will.

Here at Kidadl, we have carefully created lots of interesting family-friendly animal facts for everyone to discover! For more relatable content, check out these devil fish facts and candiru facts for kids.

You can even occupy yourself at home by coloring in one of our free printable sunfish coloring pages.

Second image by Andy Blackledge.

Bicolor Damselfish Facts

What Did They Prey On?

Algae, ascidians, crustaceans, hydroids, worms

What Type of Animal were they?


Average Litter Size?

Up to 20,000 eggs

How Much Did They Weigh?

2 lb (0.9 kg)

What habitat Do they Live In?

near coral reefs

Where Do They Live?

the western atlantic, caribbean

How Long Were They?

2-3 in (5-7.6 cm)

How Tall Were They?








Scientific Name

Stegastes partitus

What Do They Look Like?

Dark with yellow segments

Skin Type


What Are Their Main Threats?

other fish, aquarium trade

What is their Conservation Status?

Least Concern
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Written by Shivangi Pandey

Bachelor of Fashion Technology specializing in Fashion Merchandising

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Shivangi PandeyBachelor of Fashion Technology specializing in Fashion Merchandising

Shivangi is pursuing a Bachelor's degree in Fashion Technology from the National Institute of Fashion Technology. She has a strong passion for the English language and communication, with a keen interest in fashion blogging. Shivangi's educational background and interests complement her ability to create engaging and informative content for readers.

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Fact-checked by Sakshi Raturi

Postgraduate Diploma in Management

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Sakshi RaturiPostgraduate Diploma in Management

Sakshi has experience in marketing strategy, social media planning, and recruiting industry experts for capstone projects, she has displayed a commitment to enhancing their skills and knowledge. She has won multiple awards, including a Certificate of Appreciation for Creative Writing and a Certificate of Merit for Immaculate Turut, and is always seeking new opportunities to grow and develop.

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