Types of Corals

Corals are what make a reef tank feel alive, but picking the wrong ones can turn things stressful fast.

Some corals forgive small mistakes, others really do not. If you understand the main types of coral, you can plan better, avoid common headaches, and enjoy the tank more.

Below, we’ll break down the three main coral types used in reef tanks, how they differ, what each one needs to do well, and which type of coral grows fastest.

Once you can tell Soft, LPS, and SPS apart, choosing corals feels way less confusing and a lot more doable.

What Are the Three Primary Coral Types?

In the reef tank world, people usually group corals into three main types of coral reefs categories for hobby talk: Soft corals, LPS, and SPS.

It is not perfect science, but it makes shopping easier and helps you predict what care a coral will likely need.

• Soft corals are the flexible, swaying ones that often spread fast and handle small swings better.
• LPS stands for large polyp stony corals, with big, puffy tentacles and a hard skeleton underneath.
• SPS means small polyp stony corals, usually branchy and tight.

When you hear Soft, LPS, or SPS, you are really hearing a quick summary of what the coral is like to keep. It tells you what to expect before you buy.

Soft Corals

What Are Soft Corals?

Soft corals are corals that do not build a hard, stony skeleton like SPS or LPS. 

If you are learning how to identify types of coral, softies are often the easiest starting point because their shapes and movement are usually obvious in the tank.

Instead of growing like rock, soft corals grow from a softer base and can spread across nearby surfaces over time.

Common examples include zoanthids, mushrooms, and leather corals. They still need clean saltwater and steady basics, but they often handle small mistakes better than stony corals.

Key Characteristics of Soft Corals

Soft corals are known for motion and texture. Their polyps open and close, and the whole coral can wave in the current. If you want a simple coral classification chart idea in your head, softies are the flexible group that looks alive even from far away.

Most soft corals prefer low to medium light and gentle, indirect flow. They often rely on light for energy but still benefit from nutrients in the water. Another big trait is their chemical defense, since some softies can irritate nearby corals if placed too close.

Popular Soft Coral Species

Zoanthids and other polyps are some of the most popular soft corals because they come in tons of colors and form easy little mats. Mushroom corals are another favorite since they stay compact and handle lower light well. Both are common in beginner tanks.

Leather corals are also widely kept, and they are great for adding size and movement without needing perfect conditions. You will see varieties like toadstool and finger leathers in many setups. Some soft corals can spread fast, so leaving space around them helps keep the tank balanced.

Taking Care of Soft Corals

Soft corals usually do well with low to medium light and low to medium flow that is not blasting them straight on. They like stable temperature and salinity, and they do not need perfect numbers. Still, sudden swings can make them stay closed and look unhappy.

Most soft corals prefer low to medium light and gentle, indirect flow, but needs can still vary. When comparing different types of coral, it helps to watch how the coral behaves in your tank, not just the label at the store. So, keep your tank clean, but do not strip it too hard. Place softies lower to mid tank, then adjust if they stretch or shrink.

LPS Corals (Large Polyp Stony)

What Are LPS Corals?

LPS corals are large polyp stony corals, which means they have a hard skeleton but big, fleshy polyps you can clearly see. In many home setups, they represent the middle ground within types of coral reefs, giving bold looks without the strictest demands.

Even though they are stony corals, LPS usually feel less intense than SPS. They still prefer stable water, especially alkalinity and calcium, but they are not always as strict. You will often place them in moderate light with gentle to medium flow, so their tentacles can extend.

Key Characteristics of LPS Corals

LPS corals have big, fleshy polyps that inflate and extend, so they look bold and dramatic in the tank.

Many will open more at night, especially when food is in the water. If you want a quick example of this look, the Trachyphyllia geoffroyi factsheet is a solid reference.

Many open more at night when food is present. Their skeleton gives them shape, but the soft tissue is what you notice first.

A big thing with LPS is space. Some species send out long sweeper tentacles that can sting neighbors, even if they look calm during the day. They also react fast to irritation, like strong flow or rough handling, and they can tear if pushed against rock.

Popular LPS Coral Species

The torch, hammer, blastos, chalice, scolys, favia and maze corals, fungia, lobos, and frogspawn corals are classic LPS picks because they have long, flowing tentacles and strong color under reef lights. People often call them Euphyllia, and they can become a main feature in the tank. They do best with gentle, steady flow.

Other popular LPS include candy cane corals, acans, and brain corals, which tend to stay more compact while still looking full and bright.

Many of these respond well to occasional feeding, and they can show clear growth over time. Just give them room so they do not bump into neighbors.

Taking Care of LPS Corals

LPS corals usually prefer moderate light and moderate flow that keeps them moving but not whipping around. Start them lower or off to the side, then move them up only if they look dull or stretch. Keep alkalinity and calcium steady, because swings can stress them fast.

Many LPS corals respond well to feeding once or twice a week, especially at night when their feeding tentacles show. Use small meaty foods and turn down flow for a moment so food lands. Watch for tissue rubbing on rock, and give them space so they do not sting each other.

SPS Corals (Small Polyp Stony)

What Are SPS Corals?

SPS corals are small polyp stony corals, the ones that often grow into branches, plates, or tight little bushes. Their polyps are tiny compared to LPS, so the coral can look smooth from a distance. Many reef keepers chase SPS for their sharp color and structure.

SPS usually demand more stability than soft corals or LPS. They rely heavily on steady alkalinity, calcium, and magnesium, plus clean water with good flow.

Most SPS also prefer stronger light. When conditions are right, they can grow fast, but when something is off, they show it quickly.

Key Characteristics of SPS Corals

SPS corals have tiny polyps and a hard skeleton, so their beauty comes from shape, color, and fine details. Many grow upward into branches or spread into plates, and they can turn into real centerpieces. The catch is, they react quickly when something changes.

Flow matters a lot with SPS. They like strong, varied movement that keeps waste from settling and brings fresh water across the coral. Lighting is usually brighter too, which helps color stay vivid. You also need stable nutrients, not zero, because ultra clean water can still cause problems.

Popular SPS Coral Species

Acropora is probably the most famous SPS coral, with branching shapes and colors that can look unreal when it is healthy.

Montipora is another common choice, and it often grows in plates or encrusting layers. Many reef keepers like these because they show growth clearly over time.

Birdsnest corals are also popular, with thin branches that form a tight, nest like shape. Stylophora and Pocillopora show up a lot too, and they can be great stepping stones into SPS. Even within SPS, different species vary, so it helps to start with hardy options first.

Taking Care of SPS Corals

SPS corals do best when the tank is stable and mature, with strong light and strong, changing flow. Place them higher up where light is better, then watch for signs of stress like fading or poor polyp extension. Test alkalinity often, because SPS react fast to swings. Among different types of coral, SPS usually rewards patience more than quick fixes.

Keeping nutrients balanced is part of the job. SPS corals need clean water, but not stripped water, so aim for low and steady nitrate and phosphate instead of zero. Regular water changes help, and dosing may be needed to replace what growth uses. Make adjustments slowly, and avoid sudden big changes.

Coral Type Comparison Table

A quick table makes coral choices feel less messy, especially when you are staring at a wall of frags and everything looks tempting. This side by side view helps you compare the different types of coral across care level, growth speed, and behavior in one glance.

If you are still unsure, treat this table like a filter, not a rulebook. A simple coral classification chart can help you compare coral types quickly, then choose what your tank can support right now. Most problems happen when someone buys a coral that needs more stability than their system can give.

How to Choose the Right Corals for Your Tank

Start by being honest about your tank and your routine. If you miss a test day or two, that is normal, but it matters. Soft corals usually fit newer tanks and busy schedules. If your numbers stay steady week to week, LPS can be a safe step up.

Look at your equipment and layout before you buy anything. Strong reef lighting and strong flow open more options, but you can still keep a great tank with moderate gear. If you are unsure how to identify types of coral needs, start by matching coral placement to your light zones.

Your budget also matters, and so does your patience. It is smarter to buy a few healthy frags and let them grow than to rush into pricey pieces. When you choose, focus on clear tissue, good polyp extension, and clean plugs. If a coral looks irritated at the store, skip it.

Coral Recommendations for Beginners

What are the Best Soft Corals for Beginners?

For most beginners, zoanthids are a great first soft coral because they come in many colors and usually open up even in simple tanks. Mushroom corals are another safe pick, since they handle lower light and tend to stay put. Both can show growth without constant fussing.

Leather corals, like toadstools, are also beginner friendly and add a bigger, swaying shape without being too demanding. Start with one or two frags, give them room, and let them settle. If they stay closed for a day, do not panic, just check flow and basic water numbers.

What are the Best LPS Corals for Beginners?

Candy cane corals are one of the easiest beginner LPS because they are hardy, stay fairly compact, and show clear polyp extension when happy. Duncan corals are another solid choice, since they tolerate small mistakes and often grow new heads in steady tanks. Both look great without being too touchy.

Acan corals can also work for beginners if you keep them in moderate light and do not blast them with flow. Many people also do well with small brain corals, as long as they have space and stable water. Start with cheaper frags, and avoid ultra sensitive showpieces early on.

What are the Best SPS Corals for Beginners?

If you want to try SPS as a newer reefer, start with hardy options that forgive small mistakes. Montipora is a common first pick because it can grow well in many tanks, especially plating or encrusting types. Some birdsnest corals also adapt well if your tank is stable.

Stylophora and Pocillopora are often seen as beginner friendly SPS too, since they can handle slightly less perfect conditions than delicate Acropora. Even then, do not rush. Make sure your tank is consistent for a while, and start with a small frag so you can learn without stress.

Coral Care Requirements

Coral care comes down to a few basics you can actually control. Light is one of the biggest. Some corals are fine in low to medium light, while others need stronger lighting to keep color and growth. Too much light too fast can still shock them.

Flow is the next piece, and it is not just about power, it is about direction and variation. Corals like water movement that brings oxygen and carries waste away. If flow is too harsh, tissue can get irritated. If it is too weak, debris settles.

Stable water parameters matter more than chasing perfect numbers. Keep temperature and salinity steady, and test alkalinity, calcium, and magnesium on a schedule you can stick to. If you use a coral classification chart for reference, it can help you keep expectations realistic across coral groups.

Conclusion

In the end, Soft, LPS, and SPS corals all bring something different to types of coral reefs. Soft corals are the easiest way to add color and movement. LPS adds fuller shapes and stronger presence. SPS rewards consistency with structure and sharp, clean looks.

The real difference comes down to your tank and your habits. If you want simple wins, start with softies and build confidence. If your water stays steady, add LPS. Once stability is normal, SPS becomes realistic and far less stressful.

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