Frozen Krill Pacifica Flat 454g

• One ingredient – krill pacifica and nothing else. No binder, no gelatin, no added colour, no premix.
• Whole animals of around 2.5 cm – this is the single most important number on the page, because it decides which of your fish can actually eat it.
• 12.2% crude protein as fed – close to 76% on a dry-matter basis at 84.0% moisture.
• 454 g flat pack – roughly four and a half times a 100 g blister, for tanks where a blister lasts a week or less.
• Takes large, greedy feeders – the size that suits triggers, large wrasses, lionfish and big cichlids is exactly the size that defeats small-mouthed fish.
• Crustaceans feed on it readily – Ocean Nutrition lists crustaceans alongside marine and freshwater fish.
• Natural carotenoid content – krill is a recognised pigment source. Ocean Nutrition does not publish a figure for it, so none is claimed here.

Reproduced verbatim from Ocean Nutrition's published composition. Checked 7 August 2026.

Krill pacifica

Allergen, additive and source notes

• Contains crustacean. That is the entire declaration – there are no other animal or plant sources in this product.
• No preservatives, antioxidants, colours or vitamin premix are declared.
• Species: Euphausia pacifica, harvested from cold Pacific waters.

Figures are as fed, on the frozen product, as published by Ocean Nutrition.

Krill Pacifica is a whole animal of about 2.5 cm, and it does not break down into small particles the way a bound cube does. A fish needs a mouth that can take a 2.5 cm item, or the jaw strength to tear one.

Chopping thawed krill with a knife works and is common practice, but it is extra handling at every feed. If most of your stock is in the bottom two rows, buy the mysis.

Ocean Nutrition's published directions are to feed two to five times a day, and to feed only the amount the fish will consume within five minutes.

• Break or snap a portion off the frozen slab. Return the remainder to the freezer immediately – do not let the whole pack soften.
• Thaw the portion in a small cup of tank water for a few minutes, then pour it through a fine net and rinse if you want to keep the pack liquid out of the tank.
• Feed the rinsed krill into flow so it distributes rather than piling up in one spot.
• Remove anything uneaten after five minutes. Whole krill left in the sand is a common and avoidable nitrate source.

Ocean Nutrition does not publish thawing directions for the flat pack format, so the method above is our own standard practice for whole-animal frozen foods rather than a manufacturer instruction.

Protein figures below are as fed, from each product's own published analysis.

Suitable for

• Larger marine and freshwater carnivores, as listed by Ocean Nutrition for both water types.
• Crustaceans, including larger shrimp and hermit crabs.
• Predatory freshwater fish such as large cichlids, oscars and archerfish.
• Keepers who want a single-ingredient food with no premix, binder or added colour.

Not suitable for

• Seahorses, pipefish, mandarins and other small-mouthed specialists – the animals are far too large.
• Strict herbivores as a diet. Tangs and rabbitfish will eat krill happily, but they need the algae in Formula Two or a dried algae sheet.
• A complete sole diet. A single-ingredient food carries no added vitamin or mineral premix, so rotate it with a formulated food.
• Small tanks where 454 g will sit in the freezer for many months. The 100 g blister is the better format.

• Keep frozen in a domestic freezer. Reseal the pack or bag it, as an open flat pack picks up freezer burn faster than a sealed blister.
• Do not refreeze krill that has fully thawed. Discard it.
• Snap off what you need while the slab is hard. Letting the whole pack soften and refreezing it fuses it into one block you then have to chisel.

• Frozen Mysis Flat 454g – the small-particle counterpart, so one tank can feed both large and small mouths.
• Frozen Formula One 100g – a formulated diet with a full vitamin premix, to rotate against this single-ingredient food.
• Frozen Nutris Krill Pacifica 100g – the same krill in a smaller pack, if the flat is more than your tank will get through.
• Frozen Whole Krill Superba 100g – the larger Antarctic krill species, for fish that take a bigger item still.

Frozen foods are a consumable and carry no manufacturer warranty period. Your rights under the Australian Consumer Law apply in full and are in addition to anything stated here, including the guarantee that goods are of acceptable quality and fit for their stated purpose.

Frozen food is pick up only from our North Lakes store, because a pack that thaws on the way cannot be refrozen.

How big are the krill in Ocean Nutrition Krill Pacifica?

They are whole Euphausia pacifica of approximately 2.5 cm. That is large enough that small-mouthed fish such as cardinals and most gobies cannot take one whole, and it is the main reason to choose mysis instead.

What is the difference between Krill Pacifica and Krill Superba?

They are two different species. Pacifica is the smaller cold-water Pacific krill at around 2.5 cm; Superba is the larger Antarctic species. Choose by the mouth size of the fish you are feeding rather than by protein figure.

Do I need to thaw and rinse frozen krill before feeding?

Thawing makes portioning easier and lets you rinse off the pack liquid, which reduces the dissolved nutrient load entering the tank. Ocean Nutrition does not publish thawing directions for the flat pack, so treat rinsing as good practice rather than a required step.

Can I feed Krill Pacifica as my only food?

It is not the best sole diet. The declaration is a single ingredient with no added vitamin or mineral premix, so rotate it with a formulated food such as Formula One that carries a full premix.

Is the flat pack better value than the blister?

Only if you will use it. A 454 g flat pack suits a heavily stocked or large tank; in a small tank the same pack can sit in the freezer long enough to develop freezer burn, and a 100 g blister is the better buy.

Will Krill Pacifica stain my water?

The pack liquid carries carotenoid pigment and can tint the water briefly if the whole portion is tipped in unrinsed. Thawing in a cup and pouring through a fine net avoids it entirely.