Nagurus cristatus is a marine isopod species found in coastal waters, known for its adaptability and scavenging behavior.
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Nagurus cristatus is a marine isopod species found in coastal waters, known for its adaptability and scavenging behavior.
Elongated body with segmented plates, typically translucent to light brown. Adults measure up to 10–12 mm.
1–2 years
Detritus, algae, and decaying organic matter in marine environments.
An uncommon isopod in the aquarium hobby, better suited for marine specialists.
Advanced – requires a marine aquarium setup.
5+ gallons (marine setup)
8.0–8.4 (marine conditions)
Marine hardness, requires stable salinity and calcium levels.
72–78°F (22–26°C)
Up to 12 mm
Compatible with peaceful marine fish and invertebrates.
Aggressive fish and predatory invertebrates may prey on them.
Nagurus cristatus
Cirolanidae
Coastal marine waters (Atlantic and other regions)
Can be kept in groups; colony-living in natural settings.
Feeds on detritus, algae, leftover fish food, and organic debris.
Reproduces in marine conditions; females brood young in a marsupium until release.
Requires full marine salinity; brooding occurs in marsupium and juveniles are released as fully-formed isopods.
Marine salinity (SG 1.020–1.025), Temperature: 72–78°F (22–26°C).
Sensitive to water quality fluctuations and salinity instability.
Active scavenger; peaceful but opportunistic.
Active scavenger, primarily nocturnal, often hiding under rocks or substrate during the day.
Nagurus cristatus belongs to the Cirolanidae family and inhabits shallow coastal waters and estuarine environments. They are detritivores that play an important ecological role in breaking down organic matter. While less common in the pet trade, they are of scientific interest and sometimes kept in marine aquaria for study or cleanup purposes.