Most lobsters are easy to recognize.

Their shells usually have mottled greenish-brown tones that help them blend into the seafloor. But every so often, nature produces a lobster with a dramatically different appearance.

In Maine, researchers recently welcomed one of these extraordinary animals into their marine science collection.

His name is Casper, and he is a nearly all-white lobster whose unusual coloring is estimated to occur in roughly one out of every 100 million lobsters.

Rather than becoming a curiosity on a dinner plate, Casper has been given a very different role. He now lives at the University of New England’s Arthur P. Girard Marine Science Center in Biddeford, Maine, where researchers are studying the genetics behind unusual lobster colors.

The lobster was donated by the Maine State Aquarium in Boothbay, giving scientists another rare opportunity to investigate how pigmentation develops and how unusual color traits may be passed from one generation to another.

Why Is Casper Called a “Ghost” Lobster?

The first thing people notice about Casper is his color.

Instead of the familiar dark, mottled appearance of most lobsters, his shell is almost completely pale. That unusual appearance is connected to the amount of pigment present in his body.

Typical lobsters have coloration that helps them blend into their surroundings. Their shells can appear greenish, brownish, or a combination of different tones, creating natural camouflage on the ocean floor.

The bright red color commonly associated with lobsters is actually something people usually see after cooking.

According to the explanation included in the original account, heat changes a protein called crustacyanin, which normally helps hold a blue pigment in place. When that protein is altered by heat, the underlying red pigment becomes visible.

Casper’s unusual appearance comes from a very different situation.

Because he has almost no visible pigmentation, his shell remains extremely pale rather than developing the typical coloration seen in most lobsters.

That makes him one of the rarest-looking lobsters currently being studied at the University of New England.

Rare Lobster Colors Come in Many Forms

Casper may be one of the most unusual members of the collection, but he is not the only lobster with an extraordinary color pattern.

The University of New England has previously highlighted several other rare lobster color variations.

According to figures cited in the source, blue lobsters may occur at roughly one in two million, while yellow lobsters have been estimated at around one in three million.

Calico-colored lobsters are even less common, with estimates around one in 30 million, while split-colored lobsters have been estimated at approximately one in 50 million.

Casper’s near-white appearance is placed at the extreme end of this unusual color spectrum, with the estimate of roughly one in 100 million.

These numbers help illustrate just how unusual his appearance is.

However, the rarity is more than a fun fact for researchers.

Unusually colored animals can provide scientists with an opportunity to examine biological traits that are difficult to study in more common animals.

And that is where Casper’s new home becomes especially interesting.

Casper Joins a Growing Collection at UNE

Casper is part of a growing collection of unusually colored lobsters at the University of New England.

The university’s collection began attracting attention in 2021, when a yellow lobster named Banana became one of its early unusual residents.

Banana was notable not only for his bright yellow appearance but also because he was missing both claws.

Over time, additional lobsters joined the collection.

They were given names such as Peaches, Currant, and Fig, representing animals with unusual shades and patterns including orange, blue, purple, and calico.

What began as a collection of remarkable-looking animals eventually became part of a more focused scientific effort.

In 2024, the university launched a dedicated genetics study under Markus Frederich, a professor of marine sciences and director of UNE’s Invertebrate Physiology Lab.

The goal is not simply to display unusual lobsters.

Instead, researchers are using these animals to investigate one of the fundamental questions surrounding their appearance:

Why do some lobsters develop colors that are so different from the norm?

An Orange Lobster Provided an Important Clue

One of the earlier animals in the research program was an orange lobster named Peaches.

Peaches gave researchers an especially interesting opportunity because the lobster produced offspring that developed the more ordinary reddish-brown coloration.

That observation allowed scientists to examine an important question about genetics.

If a lobster has an unusual color, does that trait necessarily appear in its offspring?

The experience with Peaches suggested that the answer is not necessarily straightforward.

An unusual appearance in one generation does not automatically mean that the same visible trait will appear in the next generation.

For genetic researchers, observations like this can provide valuable information about how characteristics are inherited and expressed.

Casper now adds another unusual example to the collection.

His nearly complete lack of visible pigmentation gives the researchers another naturally occurring variation that they can examine alongside the other unusual lobsters.

More Than 15,000 Genes Are Being Examined

The research becomes particularly interesting when scientists look beyond what they can see on the outside.

A lobster’s shell color is a visible trait, but the biological processes responsible for that trait involve genetics and molecular mechanisms inside the animal.

According to the University of New England’s research announcement, Frederich’s team has analyzed more than 15,000 genes connected to lobster coloration using genetic material collected from juvenile lobsters.

The researchers are looking for clues that could help explain the molecular mechanisms responsible for different lobster colors.

In simple terms, they are trying to understand what happens at the genetic level that allows one lobster to develop an ordinary shell color while another develops an unusual blue, yellow, orange, calico, split, or nearly white appearance.

That makes animals such as Casper more than unusual additions to a university collection.

They become naturally occurring examples of biological variation.

The Lobsters Are Not Being Harmed for the Study

One important detail about the research is how genetic material is collected.

According to the source, the University of New England uses non-invasive sampling methods to obtain genetic material from the lobsters.

That means Casper and the other unusual lobsters can remain at the Marine Science Center while researchers study their genetics without conducting invasive procedures on them.

For a research program involving rare animals, this is an important distinction.

The lobsters are not being treated simply as laboratory specimens. They are living residents of the Marine Science Center while researchers use genetic samples to investigate their unusual characteristics.

The study also provides an educational opportunity for students.

Frederich described the rare lobsters as an opportunity to explore fundamental biological questions, while noting the important role undergraduate students play in the research.

Is Casper Actually an Albino Lobster?

Casper’s nearly white appearance naturally raises another question: Is he an albino lobster?

The answer is more complicated than simply looking at his shell color.

The original account describes “ghost” lobsters as having a near-total absence of pigment, a condition consistent with albinism. However, some unusually pale animals may have partial pigment loss instead, a condition commonly referred to as leucism.

These terms describe different biological situations, so researchers examining Casper’s genetics can potentially learn more about what is actually responsible for his appearance.

Rather than assuming that every pale lobster has exactly the same genetic condition, the research gives scientists an opportunity to examine the underlying biology more closely.

That is particularly valuable because Casper is not an isolated curiosity. He joins a collection that includes multiple unusual color patterns.

Comparing those animals may help researchers understand whether different colors result from different genetic mechanisms or from variations within related biological pathways.

Why Rare Animals Can Be Valuable to Science

Unusual animals often attract attention because of how they look.

A bright blue lobster, a yellow lobster, or a nearly white lobster naturally stands out. But their value to science can go beyond their appearance.

Rare variations can sometimes provide researchers with a way to study biological processes that are difficult to observe in animals with more typical traits.

In Casper’s case, his unusual pigmentation gives scientists another opportunity to investigate lobster coloration at the genetic and molecular level.

The research could help explain how pigmentation-related traits work in these animals and how certain characteristics are inherited.

It also demonstrates why maintaining carefully documented collections of unusual animals can be useful.

Instead of simply being a novelty, each lobster can contribute another piece to a larger scientific picture.

Casper Has a Very Different Future Than Most Lobsters

For most lobsters, an unusual color might simply make them a rare discovery.

Casper’s unusual appearance, however, has given him a completely different path.

He has moved from the Maine State Aquarium to a university research center, where he now serves as part of an ongoing effort to understand lobster genetics.

His nearly white shell makes him visually remarkable, but the questions surrounding that color are what make him scientifically interesting.

Researchers are studying thousands of genes, comparing animals with different coloration, and examining how traits may or may not appear across generations.

And because the sampling methods are non-invasive, Casper can remain part of that research without being harmed by the study.

A Rare Lobster With a Scientific Purpose

Casper may look like something from a storybook, but his unusual appearance is giving researchers a real-world opportunity to explore genetics.

His estimated one-in-100-million rarity makes him an extraordinary lobster to encounter in the wild, but his value at the University of New England goes beyond that number.

Alongside Banana, Peaches, Currant, Fig, and other unusually colored lobsters, Casper is helping expand a collection that has become part of a broader genetics research program.

The central mystery is simple to ask but much harder to answer:

What makes one lobster look completely different from millions of others?

By examining genetic material and comparing different color variations, researchers hope to uncover more about the biological mechanisms behind these remarkable animals.

For Casper, the future is not about becoming a meal or a passing curiosity.

Instead, this rare “ghost” lobster has found a new home where his unusual appearance can help scientists—and the students working alongside them—learn more about the fascinating genetics of one of Maine’s best-known marine animals.