Made famous by the blockbuster movie, Finding Nemo, clownfish are small fish, orange in color with white stripes outlined in black. They usually reside in a sea anemone, and if you spot one, you will most likely find its family nearby!

How Big is a Clownfish?

Clownfish are relatively small fish. An adult clownfish is on average around 3 inches (88 millimeters) long. But they may grow to around 4 inches (110 mm). Females are larger than male clownfish, with the juveniles varying in smaller sizes according to their age.

Read More: Other Incredible and Fun Marine Facts

Why are Clownfish called Clownfish?

Clownfish are actually known by the name, Amphiprion ocellaris in the scientific community. They can also be called Common clownfish or a False clown anemonefish. So where does the clownfish name come from?

Clownfish get their slang name from the bright and bold colored strokes painted across their bodies, which resembles a clown’s face paint.

And how did Nemo from the movie, get his name?

From his anemone home, a-NEMO-ne!

Do Clownfish Change Genders?

Clownfish can change genders. They are born hermaphrodites, meaning that they are born with both sex organs. Clownfish will develop first into males and then into a female if the need arises.

A clownfish family will usually consist of an adult female, an adult male, and several juveniles. When the female is removed or dies, the adult male will change genders to become female and the dominant clownfish. The largest juvenile will then step up and transform into the adult male.

The female keeps her place by dominating the male, preventing more female clownfish. While the male dominates the juveniles to prevent any reproduction between them and the female.

What is the Relationship Between a Clownfish and Sea Anemones?

Sea anemones are closely related to coral and jellyfish. They are considered marine animals as they have the ability to protect themselves using their stinging tentacles. The anemones spend their lives attached to the bottom of the sea or attached to rocks waiting for food to drift past and get caught in their tentacles.

Clownfish and other anemonefish, have evolved to develop a symbiotic relationship with the sea anemones. The clownfish depends on the sea anemone for protection and shelter; as clownfish are small, slow swimmers and easy prey. Clownfish also use anemones as protection for their nests and nibble on the anemone’s leftover food.

The sea anemone, however, uses the clownfish family to remain healthy. Anemones have been observed to thrive better with a host fish, as the clownfish keeps the anemone’s tentacles clean and free from parasites. They also drive away any butterflyfish who are looking for a tasty anemone meal. It is also thought that with the fish swimming around, and constantly fanning their fins, there is increased water flow which brings oxygen and nutrients to the anemone.

So how do the clownfish protect themselves from the sea anemone’s painful and stinging cells?

The clownfish first needs to acclimatize themselves to the stinging cells to become immune. This process involves the clownfish rubbing its body on the ends of the anemone’s tentacles to create a protective mucus layer!

How do Clownfish Reproduce?

The adult male clownfish will first prepare the nest area. This is usually below or under the anemone where the tentacles can still offer protection from predators.

The male will attract the female by extending fins, biting, chasing, and driving the female to the nest. The female will then swim over the nest a few times before laying her eggs. The male will then pass over the eggs to fertilize them.

How many Eggs do Clownfish lay?

Depending on the age of the clownfish, females can lay between 100-1,000 during one cycle. It takes about 1-2 hours for her to lay her eggs, then 6-8 days for the eggs to incubate. It has been observed that the colder the water, the longer it takes for the eggs to spawn. Once spawned, the clownfish are at the planktonic larval stage which will range from 8-12 days before becoming juvenile fish that needs to find an anemone to inhabit.

We’ve all heard the rumors, but is it all true? Do we really lay down our beach towels on tiny pellets of poop? Let’s check out this burning question and answer, once and for all, is sand really fish poop?

Is Sand Fish Poop?

Yes! Some sand is fish poop. More specifically, the fish will be parrotfish. A species of fish that bites, scrapes, and grinds bits of algae off rocks and dead corals using their strong parrot-like beaks. They digest the inedible calcium-carbonate reef material (which is usually coral skeletons) in their guts, and then excrete and poop it out as sand!

Is ALL Sand Fish Poop?

No, not all sand is fish poop. Sand is made of various bits of natural material and from many different locations. Most of the sand material starts off in-land, from rocks.

These large rocks break down from weathering and eroding over thousands and even millions of years, creating smaller rocks.

These smaller rocks then wash down rivers and streams, breaking into even smaller pieces.

The bits of rock will make it to the ocean and be tossed and turned from wind, waves, and tides, eroding into tiny pieces that finally become sand!

How is Sand Formed on Beaches?

Sand is formed on beaches by the constant movements from the wind and water. The coloring of the sand, however, comes from the material.

The tan color of most sand beaches is from iron oxide. The rocks which were originally quartz will color into a light brown from iron oxidization.

That amazing black sand comes from volcanic material eroded over time, from lava, basalt rocks, and other dark-colored rocks and minerals, and is typically found on beaches near volcanic activity such as in Amed, Bali.

You will also get sand from the by-product of living things such as shells. Some coral reefs are inhabited by foraminifera; unique aquatic organisms that live in red shells, and when they die their shells are washed ashore. The red color from these shells mixes with the sand giving the beach a pink shade when exposed to the sun.

Read More: Why Do Seahorses Hold onto Coral and More Amazing Facts about Seahorses! and Are Sharks Attracted to Bright Colors?

So there you have it, the next time you lay on that sunny tropical beach, just think about the billions of tiny grains of sand under you, and how some of it may have come through a parrotfish!