Blue Whale
Balaenoptera musculus
Blue Whale (Balaenoptera musculus) — Expert care, Peaceful, under Other. Minimum tank in the app: 26 US gal min; aim for 28–86°F and pH 7.5–8.5. Details below match the app.
Captive lifespan reflects typical experience in a home aquarium, not maximum recorded age; genetics, sourcing, and care vary.
Natural distribution
Worldwide oceans
We don’t shade a region on this simplified map—your text may be Europe-only, worldwide, listed as “Various,” captive-only, or outside the five areas used in the stocking calculator. That tool still scores whether your fish come from similar parts of the world.
Regional colours match the stocking calculator’s origin map.
Blue Whale Tank Setup
Plan for at least 26 US gal min of water—that is the minimum in our database for a workable setup, not a challenge to crowd fish. Aim to hold 28–86°F and pH 7.5–8.5 without daily drama. These fish use the All zone most, so put wood, plants, or open water there accordingly.
What Do Blue Whales Eat?
We record diet as Carnivore (micro/live foods). Offer a few food types that match—dry, frozen, or gel—and swap now and then. One flake every day for a year is how dull color and gut trouble creep in.
Blue Whale Tank Mates
Temperament in the data: Peaceful. Treat small tank mates as potential snacks once the fish grows. Not suitable for home aquariums. Or any aquarium. Or any body of water you've ever seen. Plug your full stock list into the stocking calculator—single-species compatibility scores are hints, not a whole-tank verdict.
Are Blue Whales Good for Beginners?
Not where we would send a brand-new keeper. Get a few wins under your belt with hardier fish first.
Building a community? Run the full list through the stocking calculator before you add anything else.
Similar fish to consider
Log tests and reminders in App-aquatic—free, same data you see here.