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Scientific name
Protoreaster nodosus
Family
Oreasteridae
Adult size
6-10 inches
Min tank size
75 gallons (FOWLR only)
Temperature
74-82°F
Salinity
1.022-1.026
Temperament
Peaceful but predatory toward inverts
Difficulty
Intermediate
Lifespan
7-12 years

About the Chocolate Chip Sea Star

Chocolate chip sea stars are striking carnivorous stars with raised brown bumps that look like chocolate chips on a tan body. NOT reef safe - they will eat corals, clams, snails, and other inverts. Suitable only for FOWLR or fish-only systems with hardy cleanup crew. Easy to keep with appropriate setup; one of the most commonly available marine stars.

Native range: Indo-Pacific. Most US trade specimens come through marine wholesale suppliers in Indonesia, the Philippines, Hawaii, and the Caribbean. Wild collection remains the primary sourcing method for the majority of marine inverts - few are captive-bred at commercial scale. Quality of acclimation at the wholesale/retail stage is the biggest single predictor of long-term survival in home aquaria.

What size tank does the Chocolate Chip Sea Star need?

Tank size: 75 gallons (FOWLR only). Parameters: temperature 74-82°F, salinity 1.022-1.026, plus the standard reef tank requirements - stable calcium 420-440 ppm, alkalinity 8-10 dKH, magnesium 1300-1400 ppm, nitrate under 25 ppm, phosphate under 0.05 ppm. The species requires conditions consistent with a healthy reef tank rather than nutrient-stripped sterile water - well-established systems with diverse microfauna and biofilm typically support these inverts better than newly-cycled tanks.

Lighting: depends on species. Photosynthetic inverts (clams, anemone-symbiotic species) require high-PAR reef LED lighting. Filter-feeders (worms, scallops) prefer moderate lighting and benefit from particulate-rich water. Flow: moderate, indirect flow works for most inverts - direct high-velocity flow stresses or damages soft-bodied species.

Acclimation: drip acclimate over 2-4 hours for hardy species, 4-8 hours for sensitive species (Linckia stars, sea hares, demanding nudibranchs). Never expose inverts to air during transfer - capture in a bowl underwater and transfer wet.

What does the Chocolate Chip Sea Star eat?

Chocolate Chip Sea Star diet: Carnivore - meaty foods, dead fish, shrimp, snails, small inverts. Feeding strategy depends on dietary type. Algae eaters require established tanks with biofilm and microalgae growth - new tanks lack the algal base they need. Carnivore inverts (starfish, some snails) need targeted meaty feedings 2-3x weekly. Filter feeders (clams, worms, scallops) need phytoplankton in the water column. Photosynthetic species need adequate lighting plus supplemental amino acid or coral food dosing.

Compatible tank mates

Safe: Fish 3"+ that ignore the star; large hermit crabs (some species).

Avoid: Corals, clams, small snails, small shrimp - all are food.

Breeding

Not captive bred typically.

Common problems and solutions

Cleanup crew predation; not reef safe (frequently misrepresented as such); requires varied carnivore diet.

Keeper note: Strictly FOWLR - will eat soft corals, LPS, clams, snails over time. Target-feed with meaty foods 2-3x weekly to reduce predation pressure on cleanup crew.

Frequently asked questions

What is the Chocolate Chip Sea Star?

Chocolate chip sea stars are striking carnivorous stars with raised brown bumps that look like chocolate chips on a tan body. NOT reef safe - they will eat corals, clams, snails, and other inverts. Suitable only for FOWLR or fish-only systems with hardy cleanup crew. Easy to keep with appropriate setup; one of the most commonly available marine stars.

What size tank does the Chocolate Chip Sea Star need?

The Chocolate Chip Sea Star needs a tank of at least 75 gallons (FOWLR only). Parameters: temperature 74-82°F, salinity 1.022-1.026, plus the standard reef tank requirements - stable calcium 420-440 ppm, alkalinity 8-10 dKH, magnesium 1300-1400 ppm, nitrate under 25 ppm, phosphate under 0.05 ppm. The species requires conditions consistent with a healthy reef tank rather than nutrient-stripped sterile water - well-established systems with diverse microfauna and biofilm typically support these inverts better than newly-cycled tanks.

Is the Chocolate Chip Sea Star hard to keep?

The Chocolate Chip Sea Star is rated intermediate difficulty on this care sheet. It needs a tank of at least 75 gallons (FOWLR only), a temperature of 74-82°F and salinity of 1.022-1.026. Adults reach about 6-10 inches and live 7-12 years. Chocolate chip sea stars are striking carnivorous stars with raised brown bumps that look like chocolate chips on a tan body.

What does the Chocolate Chip Sea Star eat?

Chocolate Chip Sea Star diet: Carnivore - meaty foods, dead fish, shrimp, snails, small inverts. Feeding strategy depends on dietary type. Algae eaters require established tanks with biofilm and microalgae growth - new tanks lack the algal base they need. Carnivore inverts (starfish, some snails) need targeted meaty feedings 2-3x weekly. Filter feeders (clams, worms, scallops) need phytoplankton in the water column.

What are common problems with the Chocolate Chip Sea Star?

Cleanup crew predation; not reef safe (frequently misrepresented as such); requires varied carnivore diet. Keeper note: Strictly FOWLR - will eat soft corals, LPS, clams, snails over time. Target-feed with meaty foods 2-3x weekly to reduce predation pressure on cleanup crew.

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