What happens when my Berghia Nudibranch eats all the Aiptasia?

Once the Aiptasia is completely eradicated, the nudibranchs will starve because they eat absolutely nothing else. It is highly recommended to pass them on to another hobbyist or a local fish shop before they run out of food.

Will Berghia Nudibranchs eat my corals or other anemones?

No, Berghia stephanieae are obligate predators of Aiptasia anemones only. They are completely reef-safe and will ignore all corals, zoanthids, and ornamental anemones like bubble tips.

How many Berghia should I buy for my tank?

It is generally recommended to stock roughly one Berghia Nudibranch per 10 to 15 litres of water, or to purchase a small breeding group of 3 to 5 individuals for smaller infestations. Keeping them in groups increases the chance of them locating Aiptasia and reproducing.

Why are my Berghia Nudibranchs turning white?

Their finger-like projections (cerata) take on the colour of the Aiptasia they consume, which is typically brown. If your Berghia are turning pale or white, it indicates they have not eaten recently and may be beginning to starve.

Can I keep Berghia Nudibranchs with Peppermint Shrimp?

It is strongly advised against. Peppermint shrimp and many opportunistic fish like wrasses will often prey on the small, soft-bodied nudibranchs before they have a chance to clear the Aiptasia.

MarineMarineIntermediate

Berghia Nudibranch

Berghia stephanieae

A highly sought-after marine nudibranch renowned for its strict diet of nuisance Aiptasia anemones, making it a premier natural pest control solution for reef aquariums.

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Ideal Conditions

Temperature: 24 – 28 °C
pH range: 8.1 – 8.4
Hardness: 8 – 12 dGH
Salinity: 1.023 – 1.026 SG
Adult size: 2 – 3 cm
Nano reef suitable: 10 litres+
Lifespan: 0.5 – 1 years
Diet: Obligate carnivore (Aiptasia sp. exclusively)
Water flow: Low to medium
Preferred setup: Mature reef or rockwork with an established Aiptasia population. Avoid uncovered wavemakers.

About the Berghia Nudibranch

The Berghia Nudibranch (Berghia stephanieae) is a small, fascinating sea slug native to the shallow waters of the Western Atlantic. In the marine aquarium hobby, they are celebrated for one highly specific trait: they are obligate predators of Aiptasia anemones. These nudibranchs are nocturnal and often hide within the live rock during the day, emerging at night to hunt. They possess a beautiful, delicate appearance, with a translucent body adorned in finger-like projections called cerata.

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Where Berghia Nudibranch comes from

Native range

Western Atlantic Ocean, Caribbean Sea, Gulf of Mexico

Countries / regions

United States, Bahamas

Habitat

Shallow coral reefs, rocky coastal areas, and coral rubble zones where anemones are found.

Historically misidentified as Berghia verrucicornis, which is an eastern Atlantic and Mediterranean species.

Similar species

Lettuce Sea Slug
Elysia crispata

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Compatible tank mates

Reviewed guidance based on this species' recorded traits.

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Ocellaris Clownfish
Amphiprion ocellaris
Peaceful fish that typically ignore small bottom-dwelling invertebrates.
Great
Zoanthids and Corals
Zoanthus spp.
Berghia are completely reef-safe and will only target Aiptasia, leaving all corals alone.
Great
Peppermint Shrimp
Lysmata wurdemanni
Although they also eat Aiptasia, Peppermint Shrimp are opportunistic omnivores and may hunt the soft-bodied nudibranchs.
Compatible with caution
Six Line Wrasse
Pseudocheilinus hexataenia
Active micropredators that will eagerly consume small sea slugs and nudibranchs.
Not recommended
Arrow Crab
Stenorhynchus seticornis
Aggressive predators of small invertebrates that will quickly make a meal of Berghia nudibranchs.
Not recommended

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