Gobies are some of the cutest and most manageable fish to care for. Even if you have lots of fish already in your tank, it doesn’t hurt to look into further companionship for your fish, since gobies are territorial.
There are quite a few fish that would be compatible so let’s see what we can add for more diversity in the tank.
1. Giant Sailfin Mollies (Freshwater And Saltwater)
About $4 per fish
This fish needs a large tank with moderately hard water. Their diet includes blanched spinach, cucumber, vegetable flakes, zoobenthos, and detritus. Their food is accepted either frozen or dried. Water conditions are 71-82 degrees F with a pH of 7.0-8.5. (Source)
Fun Fact: Though the fish are usually light grey, they can also present a green-blue pattern with speckles. (Source)
2. Scatophagus argus (Fresh & Saltwater)
Range from $13-$25
Scats are known to be semi-aggressive but get along well with other tank mates as long as there are fish bigger than them. They are ranked as advanced in aquatic care with aquarium hardiness of moderate levels. The temperature of the tank needs to be between 68.0-82.0 degrees with over 60 gallons worth of water. (Source)
When kept in freshwater, additional salt needs to be added to the water with every water change. As omnivores with hearty appetites, they quickly eat crustaceans and insects. They should be fed a vegetable diet (dried seaweed, lettuce, quality flake food) as their main food with occasional meat (brine shrimp, krill, Mysis shrimp, and blood worms). Flake food or fish pellets are also acceptable. (Source)
According to Tropical Fish Magazine, scats are generally a lot healthier when kept in saltwater instead of freshwater. (Source)
Fun Fact: Young scats start as colorful fish with colors of green and red. However, once they mature their colors begin to dull down in brightness. (Source)
3. Monos (Freshwater And Saltwater)
About $20 per fish
These fish need a pinch of salt in their water changes and range from 1-3 inches in length. For water, they need about 50 gallons worth. As they mature, there needs to be a higher level of salinity (Source). They can live up to a decade and their diet consists of live feeders and fish flakes (Source).
Fun Fact: While these fish are very rambunctious they are more peaceful with other tank mates. However, they are easily intimidated by large/aggressive fish. (Source)
4. Colombian Shark (Freshwater And Saltwater)
About $5.79 per fish
Columbian sharks are generally easy to care for and grow to be 14 inches in length. They need sinking catfish pellets, blood worms, and high-quality algae for their diet. Their tank size should be approximately 70 gallons with water conditions of 74-79 degrees Fahrenheit, HK 10-12, and pH 7.0-7.5. (Source)
Fun Fact: Colombian Sharks have a pointed dorsal spine that is connected to a venom-producing gland. (Source)
5. Angel Fish (Freshwater & Saltwater)
Range from $169-$269
Angel Fish can grow to 24 inches in length and 8-12 inches in size. They need to have reefs in their environment along with high water quality and a fully cycled tank. This means that the tank needs to be running three months before you add one in to ensure the nitrogen cycle is functioning correctly in the tank.
In freshwater, water changes need to be kept up regularly so the ammonia levels are controlled. Their diet includes krill, scallops, shredded shrimp, though in other cases they can have fish flakes and pellets. Angel fish must be fed five different foods a week which includes a third of lettuce weekly in the angel fish’s diet. (Source)
Fun Fact: Both male and female Angel Fish look the same. (Source)
6. Clown Goby (Saltwater)
About $29.99 per fish
Clown gobies have a peaceful temperament with an easy-care level. Their water conditions are a ten-gallon tank with a temperature of 72-78 degrees Fahrenheit, with a pH of 8.1-8.4. Their diet includes brine shrimp, frozen Mysis shrimp, table shrimp, as frozen food preparations.
Caution is advised if your aquarium contains Acropora sp or other SPS corals. This is because when their eggs are laid under the coral’s branch, the tissue of the eggs will cause a recession. (Source)
Fun Fact: The yellow clown goby is also known as the Okinawa goby or yellow coral goby. (Source)
7. Parrot Fish (Saltwater)
Range from $43-$80
Parrotfish have a strong peaceful temperament that makes them get along with most fish. The main diet should be fed a variety of meat (chopped seafood) that can be frozen as well. They can be trained to eat fish pellets and flakes. Their water parameters need to have a pH between 8.1-8.4, with a 20-30% water removal depending on the tank’s size, and a temperature of 75-78 degrees Fahrenheit. (Source)
Fun Fact: The name “parrot fish” comes from their fused teeth that resemble a parrot’s beak. (Source)
8. Clownfish (Saltwater)
About $25 per fish (if bought locally)
These fish require a 20-gallon fish tank that includes adequate filtration, pumps, water supplements, reef structure that includes live rock and sand. Their diet includes algae, zooplankton, worms, and other small crustaceans. Their food can be served both frozen, fresh, and dried. They are also the ideal beginner fish. (Source)
Fun Fact: Clownfish follow a strict hierarchy by having the most aggressive female in the front. Clownfish are all born as males. (Source)
9. Blue Tangs (Saltwater)
Start at $109.99-$199.99
These beautiful fish can grow to 1′ and are reef compatible and require a minimum of 180 gallons of water with 6 feet in length for their tank size. Their care level is moderate though they can be semi-aggressive. Water conditions need to be 72-78 degrees F with a pH of 8.1-8.4.
Blue Tangs will eat meaty food but require to be fed three times a day with marine-based dry seaweed tied to a rock (or veggie clip) and algae. This will help improve their immune system and reduce aggression to other tank mates. (Source)
Fun Facts: Blue Tangs have sharp poisonous spines on both sides of their tails to defend themselves when attacked. (Source)
10. Dotty Backs (Saltwater)
Range from $45-$55
Dottybacks eat live, frozen, or dry food. Their diet includes worms, spirulina-enriched brine shrimp, and flake food. They can grow up to 2.8 inches and can survive with tough larger fish (Source). These fish commonly dwell on the bottom and require a tank size of 30 gallons with a temperature from 74-82 degrees F.
Fun Fact: While these fish are sold as a good beginner for aquarists, they’re actually one of the most aggressive fish one could own. This makes them more as a challenge than easy. (Source)
11. Blennies (Saltwater)
Range from $20-$90
Blenny fish require lots of live rock with algae growth because they feed on algae. This can be supplemented with dried algae sheets with a veggie clip under a live rock. They don’t do too well in a reef tank as they tend to nip at corals and clam mantles.
Blenny fish can grow to be 4-6 inches and live for four years or more. The tank must be kept at 70-82 degrees Fahrenheit, a pH of 8.2-8.4, and 30 gallons of water worth. Forewarning, as the blennies mature they can become aggressive with other tank mates because of their nasty bites. (Source)
Fun Fact: These fish are known to mimic other species of fish by copying their behaviors. (Source)
12. Rasbora (Freshwater)
About $3 per fish
The maximum size for this fish is about 2 inches and their diet consists of blood worms, brine shrimp, glass worms, and frozen plankton. They do need a vegetable substance in their diet. Occasionally, they can have a diet of fish flakes.
The tank water temperature needs to be around 72-82 degrees Fahrenheit and needs a 10+ gallon tank that is densely planted. The Rasbora is known to be peaceful and should be kept with others who have the same temperament. (Source)
13. White Cloud Minnows (Freshwater)
Range from $4-$6
Another easy level fish with a peaceful temperament, these fish are omnivores so they can have most anything of what your other fish have. They can grow to 1.5 inches, live up to 5-7 years, and can be compatible with any fish in the aquarium. The tank needed is a 10-12 gallon with a temperate stream biotope with a temperature of 64-72 degrees F. (Source)
Fun Fact: Male White Cloud Minnows are much more slender and colorful than females. (Source)
14. Sparkling Gourami (Freshwater)
About $4 per fish (although stores will often offer discounts if sold in pairs/groups)
Sparkling Gourami grows to be 1-1.6 inches and is easy to care for. Their temperament is relatively peaceful but is a bit territorial preferring a group of six or less. These fish are omnivores and their tank requirements are to be 15 gallons, freshwater plants, and a temperature between 77 degrees F or 71.5-80.5 degrees F.
Sparkling Gourami are not only known for their color pallet but they can make sounds of croaking/chirping when happy or mating. (Source)
Fun Fact: Another name the Sparkling Gourami go by is the Pygmy Gourami and are native to Southeast Asia. (Source)
15. Kuhli Loaches (Freshwater)
Range from $2.49-$22
Kuhli loaches are omnivores and can have both aquatic crustaceans and algae. The diet does need to be rotated daily as they consume food in 2 minutes once or twice. Their size can grow between 2 inches to a foot long. Their bedding needs to have a mix of gravel, pebbles, and smooth rocks with no plants. This will help stimulate the natural habitat for them.
The pH should be between 6.0-8.0 and require well-oxygenated water with a strong flow. Every week needs to have a 10% water change with every two weeks needing a 25% water change. It is recommended to use an Aqueon Aquarium Heater for the best water temperature. Tank temperature varies depending on the species. If possible, it is recommended that loaches are bought in groups of six as they are gregarious though they are known to do well in community aquariums. (Source)