Introduced freshwater species

Names and classification

Record type

threat

Kauaʻi occurrence and status

Recorded state

Active / stream- and wetland-specific

Threats and conservation

Pressure source

Non-native fishes, amphibians, invertebrates, plants and pathogens

Exposure pathway

Predation, competition, habitat modification and disease in freshwater systems

Consequences

Reduced native abundance, altered food webs and management conflicts

Affected requirements

Native aquatic species, food webs and stream/wetland function

Susceptibility

Streams, wetlands, reservoirs and estuarine transitions

Reversibility

Often difficult to reverse after widespread establishment; localized control may be feasible

Early warning indicators

Occurrence/abundance; recruitment; diet/predation evidence; range expansion

Conservation interventions

Implementation limits

Magnitude, exposure and trend are not assumed uniform across Kauaʻi; local evidence governs.

Sources and further reading

• https://dlnr.hawaii.gov/wildlife/files/2026/03/FINAL-2025-SWAP.pdf
• https://www.fws.gov/species/invasive-species/about-invasive-species

Connected Atlas records

• Perennial stream ecosystem · Ecosystems
• Intermittent stream ecosystem · Ecosystems
• Freshwater marsh & palustrine wetland · Ecosystems
• Estuary / muliwai ecosystem · Ecosystems
• Reservoir, ditch & canal aquatic system · Ecosystems