Nepedia
Back to Discover
Advanced Reader
🧬

Pomacanthidae

life science Maturity 7-9 war conflict Next article →

This article covers sensitive topics: war_conflict. Parents can manage visibility in Parental Controls.

Marine angelfish are colorful fish belonging to the family Pomacanthidae.

Regal angelfish
Regal angelfish

These fish live on shallow reefs in the tropical Atlantic and Indian Oceans. Most species are found in the western Pacific Ocean. They are part of the order Perciformes or Acanthuriformes depending on the scientist.

Bluering Angelfish
Bluering Angelfish

This family is important for keeping coral reefs healthy. They help manage the growth of other organisms on the reef. They are very different from the freshwater angelfish found in the Amazon Basin.

To identify a marine angelfish, scientists look at specific physical features. They have deep, laterally compressed bodies that are thin from side to side. This shape helps them move through tight spaces in the reef. They are distinguished from the similar-looking butterflyfish by strong preopercle spines. These are sharp spines located on the gill covers. The family name Pomacanthidae comes from the Greek words for "cover" and "thorn."

Pomocanthus imperator facing right
Pomocanthus imperator facing right

Many species also have long, streamer-like extensions on their fins.

There are many different types of angelfish within this family. The family contains about 86 to 88 species divided into seven or eight genera. Some groups, like the genus Centropyge, are very small. These fish do not grow larger than 4 inches. Other groups are much larger and more widely distributed. The gray angelfish, Pomacanthus arcuatus, is one of the largest species.

The queen angelfish is another famous example with bright scales.

Angelfish have very specific ways of eating to survive. Their feeding habits are often defined by their genus. Species in the genus Genicanthus eat tiny floating animals called zooplankton. Members of the genus Centropyge prefer to eat filamentous algae. Many other species eat sessile benthic invertebrates. These include sponges, tunicates, bryozoans, and hydroids.

Flame angelfish (Centropyge loricula)
Flame angelfish (Centropyge loricula)

On Caribbean reefs, they eat many sponges. This prevents sponges from overgrowing the reef-building corals.

These fish have a very interesting way of growing and reproducing. Many species are protogynous hermaphrodites. This means they can change their biological sex during their lives. If the dominant male in a group is removed, a female will turn into a functional male.

Genicanthus personatus NOAA
Genicanthus personatus NOAA

They also show dramatic color changes as they reach maturity. For example, young male ornate angelfish look like females. As they grow, they develop bright orange bands on their bodies.

Most angelfish are diurnal, which means they are active during the day. They spend their nights hiding in the nooks and crevices of the reef. They usually stay in the shallow parts of the ocean. However, some species like Centropyge abei live in deeper water.

Apolemichthys xanthurus
Apolemichthys xanthurus

Their social lives also vary by species. Some live alone or in mated pairs. Others live in harems where one male leads several females.

Angelfish are also known for their unique relationship with humans. Many people called aquarists keep them in home tanks. They are considered hardy fish because they adapt well to water changes. They can handle different levels of pH and water hardness.

Holacanthus ciliaris 2
Holacanthus ciliaris 2

While they are popular, some large species are caught for food. This can be dangerous because of ciguatera poisoning. This is a type of poisoning reported from eating certain marine angelfish.

514 words

Where will your curiosity go next?

Keep exploring at your chosen reading level.

🖼️ Images & Media (10)
File:Regal angelfish.jpg
Regal angelfish.jpg
File:Bluering Angelfish.jpg
Bluering Angelfish.jpg
File:Apolemichthys xanthurus.JPG
Apolemichthys xanthurus.JPG
File:Flame angelfish (Centropyge loricula).jpg
Flame angelfish (Centropyge loricula).jpg
File:Bluestriped angelfish Chaetodontoplus septentrionalis Side 1883px.jpg
Bluestriped angelfish Chaetodontoplus...
File:Genicanthus personatus NOAA.jpg
Genicanthus personatus NOAA.jpg
File:Holacanthus ciliaris 2.jpg
Holacanthus ciliaris 2.jpg
File:Centropyge multifasciata.jpg
Centropyge multifasciata.jpg
File:Pomocanthus imperator facing right.jpg
Pomocanthus imperator facing right.jpg
File:Pygoplites diacanthus 01.jpg
Pygoplites diacanthus 01.jpg
More to explore

✨ What else?

Related topics you might enjoy

🔬 Go deeper

More advanced topics to explore

🪜 Step back

Simpler topics to build understanding

What is Nepedia?

A free, ad-free encyclopedia for children. Every article is written at five reading levels, so the same page works for a five-year-old and a fifteen-year-old — use the level switcher above to see this one change. No account needed to read.