Care Guide for Diamond Goby: Everything You Need to Know

Care Guide for Diamond Goby: Everything You Need to Know

Care Guide for Diamond Goby: Everything You Need to Know

Max Size

6 inches 

Minimum Tank Size

30 Gallons

Most Active



3 to 5 years 


Meaty foods


White, Yellow, Orange 

Care Level

Easy, great for beginners 

Aggression Level


Reef Safe


Tank Region


Looking for a care guide for diamond goby? In this blog post, we will discuss everything you need to know about taking care of this fish. We will cover topics such as feeding, tank size, and water parameters. We will also provide some helpful tips on how to keep your diamond goby healthy and happy!

Some of its common names are diamond watchman, orange-spotted goby, and diamond sleeper goby, while the scientific name of Diamond Goby is Valenciennea puellaris.

Origins and Habitat

The diamond goby is a small fish that is found in the reefs of the Indian and Pacific Oceans. It gets its name from the unique diamond-shaped markings on its body. This fish is a common sight in saltwater aquariums, where it is often used to help control algae growth.

Diamond Goby Appearance

Diamond goby’s has a semi-translucent white body with a few lines running vertically down their bodies. They have a large head in comparison to their body, and their eyes are large. 

These species have both a spiny and a soft dorsal fin, they are typically shy fish that prefer to remain hidden among the rocks or coral.

How Much Does a Diamond Goby Cost?

Diamond goby typically costs somewhere in the $30-$45 range. However, prices can vary depending on factors such as the fish’s size, coloration, and overall quality.

Some diamond gobies may even be priced higher than $45 if they are particularly rare or exotic-looking. So, if you’re interested in purchasing a diamond goby, be sure to shop around and compare prices before making your final decision.

Recommended Tank Size for Diamond Goby

The recommended tank size for a diamond goby is at least 30 gallons. However, if you are planning on keeping more than one fish, you will need a larger tank.

Water parameters

Diamond gobies are relatively tolerant of different water conditions. pH levels should not be lower than 8.5 or 8.1 and specific gravity must be 1.020 to 1.025

An ideal temperature range for these fish is between 75-82 degrees Fahrenheit. Since the Diamond Gobby is an active fish, you need to have a strong sump or refugium to provide it the nutrients it needs when feeding. It is crucial that the water in your fish tank be changed at least every two weeks.

How To Feed Diamond Gobby?

Diamond goby is a carnivorous fish, which means they require a diet that is high in protein. They should be given a variety of frozen and live foods such as brine shrimp, mysis shrimp, copepods bloodworms, and live blackworms.

It is also a good idea to supplement their diet with vitamin-enriched flake food or pellets. Be sure to feed your diamond goby several small meals throughout the day, rather than one large meal.

Be careful not to overfeed your fish, as this can lead to health problems such as obesity and digestive issues.

Breeding Diamond Goby

Diamond gobies are relatively easy to breed in captivity. They typically reach sexual maturity at around six months of age.

To encourage breeding, it is best to keep a ratio of one male to two females. The males will often build nests out of sand or rubble in order to attract a mate.

Once the female has laid her eggs, the male will fertilize them and then care for them until they hatch. The fry (baby fish) will be able to eat small live foods such as copepods and newly hatched brine shrimp.

How Often Should You Feed a Diamond Goby?

They are not fussy eaters, and will accept most freeze-dried, frozen, and live foods. Many reefers like to supplement their diet with copepods and amphipods, which often inhabit live rock in reef tanks. In the wild, these types of small crustaceans make up the majority of their diet. Feeding 2-3 times per day is sufficient. 

It’s best to feed small amounts at a time so that everything is eaten. Gobies have small mouth, so they can’t eat very large pieces of food. If you’re using freeze-dried or frozen foods, make sure to soak them in some tank water beforehand, so they’re softer and easier to eat.

How to Keep Diamond Golby Healthy?

Diamond Golby can be a valuable asset because they help keep the algae levels in check, but keeping them healthy in a reef tank can be a challenge. Fortunately, there are a few things you can do to help keep your diamond goby healthy in your reef tank:

Make sure you are providing enough food for your goby. Diamond gobies typically eat small invertebrates such as brine shrimp, so make sure you are feeding your fish a varied diet that includes plenty of live prey.

Your tank should be well-lit and the water is properly filtered. Diamond gobies prefer tanks with moderate to high levels of lighting and good water flow.

They prefer tanks with moderate to high levels of lighting and good water flow. Finally, be sure to keep an eye on the water temperature and pH levels in your tank, as both of these factors can affect the health of your diamond goby.

Tank mates for Diamond Gobby

Gobies are a popular fish for home aquariums, and the diamond gobby is a particularly striking variety. This fish does best when kept in small groups, so if you’re thinking of adding one to your tank, it’s important to choose the right tank mates. Here are some suggestions for suitable companions for your diamond gobby.

  • Damsels
  • Pink Fairy Wrasse
  • Foxface Rabbitfish
  • Cleaner Wrasse
  • Shrimps
  • Clownfish
  • Filefish

Species to Avoid Keeping With the Diamond Watchman Goby

When it comes to selecting a compatible species to keep with the diamond goby, there are a few things to take into consideration. Unfortunately, not all fish make suitable tank mates.  Here are the species you need to avoid:

  1. Lionfish
  2. Triggerfish
  3. Grouper
  4. Sturgeon
  5. Pufferfish
  6. Trumpetfish


We get a lot of questions about diamond goby, so we’ve compiled a list of the most frequently asked questions to help you care for your fish.

Can I Have 2 Diamond Gobies?

While it’s possible to keep more than one diamond goby in a single tank, it’s not recommended. These fish are known to be aggressive towards each other, and they will often fight to the death. If you do decide to keep more than one diamond goby, be sure to provide plenty of hiding places and rocks for them to claim as their own territory.

What Is the Lifespan of a Diamond Goby?

The average lifespan of a diamond goby is between three and five years. However, with proper care, it is not unusual for these fish to live for six years or more.

Do Diamond Gobies Need a Sand Bed?

No, diamond gobies do not require a sand bed. In fact, they prefer to live in areas with plenty of rocks and hiding places. A sand bed can actually be dangerous for these fish, as they are known to burrow into the sand and then get stuck.

How Big Do Diamond Gobies Get?

Diamond gobies typically reach a length of about four inches. However, they can grow up to six inches in some cases.

Do Diamond Gobies Jump?

It’s a common question for those who are thinking about getting a diamond goby – do they jump? The answer is yes, they can jump. However, it’s not something that they do often, and usually, only happens when they’re startled or frightened. 

Jumping isn’t the only way that diamond gobies can escape from predators or other threats – they’re also good swimmers. In fact, they’re so good at swimming that many people keep them as pets in aquariums.

If you’re thinking about getting a diamond goby, just be sure to put a lid on the aquarium to prevent any potential Jumping surprises!

Can Diamond Goby Get Ich?

Yes, diamond gobby can get ich. It is a common disease that can affect both fresh and saltwater fish. It’s caused by a parasite that enters the fish’s body and attaches itself to the gills, skin, or fins. Symptoms of ich include lethargy, loss of appetite, and white spots on the fish’s body.

If your diamond goby is displaying any of these symptoms, it’s important to take action immediately. The best way to treat ich is to raise the temperature of the water in your tank and add a saltwater treatment. You can also remove any infected fish from the tank and quarantine them in a separate aquarium.

Are Diamond Gobies Hard to Keep?

No, diamond gobies are not hard to keep. In fact, they’re one of the easier species of fish to care for. As long as you provide them with suitable habitat and keep an eye on water quality, they should do well.

You now have the care guide for diamond gobies in a reef tank. Remember to give them plenty of hiding places and keep an eye on water quality. If you follow these simple steps, your fish should thrive and you can expect 3 to 5 years of enjoyment from your little diamond gobby buddies. 

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