Lake Michigan

Lake Superior has the largest volume of all the Great Lakes. It is the coldest and deepest and because it has a cooler climate and poor soil conditions it is the least polluted.

Lake Superior

blobfish

11 of the Most Beautiful Marine Fish to keep

• Coral Beauty (Centropyge bispinosa)
• Copperband Butterfly (Chelmon rostratus)
• Queen Angel (Holacanthus ciliaris)
• Wreck Fish (Pseudanthias squamipinnis)
• Clown Triggerfish (Balistoides conspicillum)
• Antennata lionfish (Pterois antennata)

It includes a wide range of beautiful species, so there’s something for everyone!

1. Peacock Cichlid. We’re starting off our list of colorful freshwater fish with the Peacock Cichlid.
2. Jack Dempsey.
3. Electric Blue Acara.
4. Discus.
5. German Blue Ram.
6. Endler’s Livebearer.
7. Paradise Fish.
8. Gourami.

75 gallons offers plenty of space for some of the most colorful marine fish too. Butterflyfish, Wrasse and marine Angelfish are among the most popular. You can even use a 75 gallon aquarium to host a single Lionfish.

So, here are our 29 favorite coolest freshwater aquarium fish that any hobbyist would love to have in their collection!

• Flowerhorn Cichlid.
• Black Molly.
• Celestial Pearl Danio.
• Checkerboard Discus.
• Pearl Gourami.
• Bloodfin Tetra.
• Swordtail. Image Source: commons.wikimedia.org.
• Archer Fish. Maximum size: 12 inches.

Bottom Line. The one-inch-per-gallon rule still applies, so be sure that you do not exceed 55 inches of fish in a 55-gallon tank. This roughly equates to four or five bottom-dwelling fish along with a couple algae eaters.

Here is a list of the best fish for a 55-gallon tank:

• Cory Catfish.
• Plectostomus.
• Kuhli Loach.
• Cherry and Ghost Shrimp.
• Three-Spot Gourami.
• Dwarf Gourami.
• Angelfish.
• Neon Tetra.

Can you keep an Oscar in 55 gallon tank? Yes, you can keep an Oscar Fish in 55 gallon tank. However, after some time its growth will be stunted once it reaches 10 inches. Oscar Fish can get pretty large and it can grow up to 20 inches.