Choosing a name for your blue fish is one of the first and most personal decisions you make as a new fishkeeper. A great name captures something essential about the fish: its color, its movement, its personality, or the feeling it evokes when you watch it glide through the water. Blue fish, with their cool tones and often serene presence, lend themselves to a wide range of naming possibilities.
This list of 75 blue fish names is organized by theme so you can find the right fit quickly. Whether you want something that references the ocean, a gemstone, a mythological figure, or something playfully silly, there is something here for every blue fish and every personality type.
Ocean and Water-Inspired Names
Blue fish naturally evoke the ocean, rivers, and all things aquatic. These names celebrate that connection and work especially well for fish with deep, rich blue coloring reminiscent of open water.
1. Pacific - After the world largest ocean, ideal for a calm, majestic fish. 2. Azure - The classic word for sky-blue, perfect for pale or bright blue fish. 3. Caspian - After the Caspian Sea, an elegant and uncommon choice. 4. Marlin - Inspired by the famous blue-striped ocean fish. 5. Coral - A nod to the reef environment where so many blue fish live. 6. Tide - Simple and evocative, great for a fish with flowing fins. 7. Lagoon - Perfect for a fish with the rich blue-green of a tropical lagoon. 8. Brine - A quirky, salty ocean reference for a fish with character. 9. Eddy - After the circular water current, suits an active, swirling swimmer. 10. Shoal - A great name for a solo fish with the spirit of a school.
Sky and Weather Names
The color blue is just as strongly associated with the sky as it is with water. Sky-inspired names work beautifully for pale blue fish, bettas with iridescent coloring, or any fish whose color shifts in the light.
11. Nimbus - A rain cloud name with a grand, mysterious quality. 12. Cirrus - The wispy, high-altitude cloud type, elegant and delicate. 13. Zephyr - The west wind, ideal for a light, graceful swimmer. 14. Cumulus - The puffy white-tinged cloud, works for a fish with blue and white coloring. 15. Storm - Bold and powerful, fits a larger or more aggressive blue fish. 16. Mist - Soft and subtle, great for a pale blue or translucent fish. 17. Gale - A strong wind name, suits an energetic, fast-swimming fish. 18. Drizzle - A gentle, whimsical name for a small, softly colored fish. 19. Stratus - The low, flat cloud layer, calm and understated. 20. Breeze - Light and cheerful, a friendly name for a sociable fish.
Gemstone and Mineral Names
Blue gemstones are among the most beautiful in nature, and many have a resonance that translates perfectly to the brilliant color of blue aquarium fish. These names carry a sense of value and beauty that matches the jewel-like quality of a healthy blue fish in a well-lit tank.
21. Sapphire - The quintessential blue gemstone name, timeless and striking. 22. Cobalt - A deep, rich blue mineral reference with a strong, clean sound. 23. Lapis - From lapis lazuli, the ancient blue gemstone, unusual and distinctive. 24. Azurite - A brilliant blue copper mineral, perfect for a metallic blue fish. 25. Tanzanite - A rare violet-blue gemstone, suits fish with purple-blue tones. 26. Topaz - Usually blue, this elegant gemstone name is soft and beautiful. 27. Crystal - Clean and clear, ideal for a pale blue or nearly transparent fish. 28. Opal - Iridescent and shifting, suits fish whose blue color changes with the light. 29. Beryl - A blue-green mineral family, an unusual and sophisticated choice. 30. Indigo - The deep blue-violet of natural dye, rich and distinctive.
Mythology and Legend Names
Blue has long been associated with gods, the divine, and the supernatural across many cultures. Mythological names give your fish a sense of history and gravitas, and the stories behind them are often fascinating.
31. Poseidon - The Greek god of the sea, a powerful name for a dominant fish. 32. Neptune - The Roman sea god and name of the blue planet, grand and regal. 33. Triton - The messenger of the sea in Greek myth, energetic and fluid. 34. Nereid - One of the 50 sea nymph daughters of Nereus, graceful and ethereal. 35. Aegir - The Norse god of the sea, strong and ancient-sounding. 36. Ran - Norse goddess of the sea who collected drowned sailors, mysterious. 37. Thetis - The sea nymph mother of Achilles, gentle yet powerful. 38. Calypso - The nymph of the sea who held Odysseus, magnetic and enchanting. 39. Proteus - The shape-shifting sea god, suits a fish with changeable color. 40. Leviathan - The legendary sea monster, a bold name for a large or aggressive blue fish.
Cool and Calm Personality Names
Blue evokes calm, cool, and collected energy. These names celebrate the serene, effortless quality of a beautiful blue fish gliding through clear water.
41. Chill - Laid-back and modern, works for a relaxed, unhurried fish. 42. Zen - Peaceful and centered, suits a slow-moving or contemplative fish. 43. Serene - Quietly beautiful, ideal for a graceful, non-aggressive fish. 44. Glacier - Cold, slow, and majestic, for a large fish with a steady presence. 45. Frost - Clean and cool, works for a pale blue or white-edged blue fish. 46. Slate - The grey-blue of stone, suits a fish with muted, sophisticated coloring. 47. Denim - Casual and familiar, a fun modern name for a medium blue fish. 48. Steel - Strong and metallic, for a fish with a silvery-blue sheen. 49. Shadow - Dark and mysterious, suits a deep blue or dark blue-black fish. 50. Misty - Soft and dreamy, a gentle name for a delicate or pale blue fish.
Pop Culture and Fun Names
Sometimes the best fish name is one that makes you smile every time you say it. Pop culture references, puns, and playful names are a beloved tradition in the fishkeeping hobby.
51. Dorey - After the beloved blue tang from a famous animated film. 52. Falkor - The luck dragon from The Neverending Story, for a long, flowing fish. 53. Sonic - The famous blue hedgehog, suits a fast, energetic fish. 54. Blue Steel - The Zoolander reference, for a fish that knows it looks good. 55. Bluebell - Sweet and floral, a charming name for a smaller blue fish. 56. Blueport - A made-up place name, quirky and original. 57. Teal Deal - A punny name for a blue-green teal-colored fish. 58. Cerulean - The Crayola crayon color, nostalgic and vivid. 59. Byte - A tech-inspired name, fits a quick, darting fish. 60. Blueberry - Sweet and round, perfect for a small, plump blue fish.
International and Exotic Names
The word "blue" translates into beautiful sounds across many languages, offering unique name options that carry cultural resonance and distinctiveness.
61. Azul - Blue in Spanish and Portuguese, simple and melodic. 62. Blau - Blue in German, short and striking. 63. Blu - Italian for blue, smooth and modern. 64. Bleu - French for blue, elegant and sophisticated. 65. Aoife - An Irish name meaning radiance, suits a luminous blue fish. 66. Kai - Means sea in Japanese and Hawaiian, perfect for an aquatic pet. 67. Mavi - Blue in Turkish, gentle and uncommon. 68. Neel - Blue in Hindi, a beautiful and unusual choice. 69. Sini - Blue in Finnish, soft and poetic. 70. Kek - Blue in Malay, short and striking.
Classic and Timeless Names
Sometimes the simplest names are the most lasting. These five names have proven popularity and work beautifully for blue fish of any species or personality.
71. Blue - Direct and honest, a name that never goes out of style. 72. Sky - Light, airy, and always appropriate for a blue fish. 73. River - Flowing and natural, suits any fish with graceful movement. 74. Ocean - Grand and expansive, works for any fish that feels like a small sea. 75. Blu - The modern, minimalist version of blue, clean and stylish.
How to Pick the Right Name
The best fish name is one that feels right to you after watching your fish for a day or two. Observe how your fish moves: is it bold and fast, or calm and deliberate? Does its color lean toward bright electric blue, deep navy, or a soft powder blue? Does it have any distinctive markings, a spotted tail, a red edge on its fins, or a particular facial expression that stands out?
Many fish owners find that the name announces itself after a few days of observation. You watch your fish patrol its territory, and suddenly "Neptune" just fits, or you catch it hovering motionlessly in the current and "Zen" comes to mind. Do not rush the decision. A good fish name is a small but genuine joy every time you say it.