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German wasp | Vespula germanica

German wasp

Vespula germanica

Coral bush | Ardisia crenata

Coral bush

Ardisia crenata

Purple loosestrife | Lythrum salicaria

Purple loosestrife

Lythrum salicaria

Pom pom weed | Campuloclinium macrocephalum

Pom pom weed

Campuloclinium macrocephalum

Canarybird bush | Crotalaria agatiflora

Canarybird bush

Crotalaria agatiflora

Peanut butter cassia | Senna didymobotrya

Peanut butter cassia

Senna didymobotrya

Rubber vine | Cryptostegia grandiflora

Rubber vine

Cryptostegia grandiflora

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Environmental Programmes

In order to tackle our country’s socio-economic challenges, the government adopted the Outcomes based approach to improve government performance and providing focus on service delivery. find out more

Smallmouth bass

Micropterus dolomieu

Common name:

Smallmouth bass

Scientific name:

Micropterus dolomieu


The smallmouth bass is a small predatory fish, reaching up to 60mm in length and 2kg in mass. It is an olive to coppery-yellow colour above, with darker olive vertical stripes and a dusky white underneath. Breeding usually occurs in early summer in shallow waters. Smallmouth bass has caused a decline in indigenous species through environmental degradation and predation.

Additional Info

  • Where does this species come from?

    North America

    What is its invasive status in South Africa?

    NEMBA – Category 1b in National Parks, Provincial Reserves, Mountain Catchment Areas and Forestry Reserves declared in terms of the Protected Areas Act. NEMBA - Category 2 for release into damns within descrete catchment systems in which it occurs. NEMBA - Category 3 in all rivers, wetlands, natural lakes and estuaries in which it occurs.

    Where in South Africa is it a problem?

    Throughout South Africa, widespread in temperate regions (Eastern and Western Cape)

    Why is it a problem?

    The smallmouth bass has had a devastating effect on indigenous species, the main factor of the decline in indigenous species, being environmental degradation. Predation on indigenous organisms has also had a significant effect on ecosystems.

    What does it look like?

    Description: Predatory fish, with a large head and mouth, reaching up to 5kg in weight and 60cm in length. Olive to coppery-yellow colour above, with darker olive vertical bars, dusky white underneath and red eyes. Habitat: Freshwater, preferring rocky pools and dams. Breeding: Occurs in early summer. Nest built in shallow waters.

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General News Updates

2019 National Symposium on Biological Invasio…


This is your invitation to South Africa's 2019 National Symposium on Biological Invasions. The convention is hosted by the Centre for Invasion Biology (CIB), University of Stellenbosch, and the Biolo... Read more

2019 Invasive Species Training


During the past five years (2014-2018), ISSA invasive species trainers have trained 4 000 in the identification of invasive species and laws pertaining to invasive species across South Africa.  ... Read more

Alien Grass Working Group


Who are we? The South African National Alien Grass Working Group was jointly initiated by the South African Biodiversity Institute (SANBI) and the Centre for Excellence in Invasion Biology (C·I·B) in... Read more

Permits for planting indigenous Cynodon?


On 16 February, 2018, South Africa's Department of Environmental Affairs issued amendments to the regulations and lists relating to the National List of Invasive Species.  Updates to the draft&n... Read more

Invasive species training 2018 dates released


Interested in invasive species?  How much do you know about NEMBA invasive species compliance for landowners and organs of state? The South African Green Industries Council (SAGIC) have released... Read more

Communications post for Africa advertised


The Nature Conservancy has advertised a brand new post:  Communications Manager, Africa Region. Knowledge of invasive species and water would be an asset in this post. See details below:    Job Titl... Read more