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Saltwater Fish Nutrition Calculators and Tools

These calculators work out what and how much to feed a saltwater fish: daily calories, portion sizes, feeding schedules, water needs and which foods to keep away from it. All 2 are free, quick and based on saltwater fish reference data.

Nutrition2 tools

All 2 saltwater fish nutrition tools

Saltwater Fish Nutrition tools: what they help with

These calculators work out what and how much to feed a saltwater fish: daily calories, portion sizes, feeding schedules, water needs and which foods to keep away from it. Diet is the single biggest thing most owners control. Getting portions right prevents obesity and the many problems that come with it in a saltwater fish.

What to know about nutrition and feeding for saltwater fish

Saltwater fish are omnivores, which shapes what you feed and how much.

Saltwater Fish quick facts

Reference values for saltwater fish from the species data behind this tool.
MeasureSaltwater Fish
Typical lifespan5–15 years
DietOmnivore
Mature atAbout 1 years
Clutch size200–300 eggs

A practical tip

Weigh food rather than using a cup or scoop. Measuring by volume is one of the most common reasons pets are overfed.

Other saltwater fish topics

Saltwater fish care rarely sits in one box. You may also find these useful: saltwater fish age tools, saltwater fish behavior tools, saltwater fish breeding tools and saltwater fish cost tools. Or see every saltwater fish tool in one place.

Nutrition tools for other pets

The same kind of tool exists for other species, each using that animal's own reference data: goldfish nutrition, betta fish nutrition, guppy nutrition and molly nutrition.

Frequently asked questions

How much should I feed my saltwater fish?

It depends on body weight, age and activity. The saltwater fish food and calorie calculators give a daily starting amount, which you then adjust based on body condition.

Which saltwater fish nutrition tool should I use first?

Most people start with the Saltwater Fish Feeding Schedule Planner, the most used tool in this group. If your question is more specific, the list above describes what each of the 2 tools does.

How accurate are the results?

They are estimates based on published reference data for saltwater fish, and each tool lists its sources. Individual animals vary, so treat results as a guide and check health decisions with your vet.