Select Page

What plant is this? (5)


(Blue-green algae)

Blue-green alae form on fresh or brackish water (or discolour water without forming a floating scum). They look green and sometimes turn bluish when scums are dying.

algal bloom on dam

What it causes: Some species of cyanobacteria are capable of producing neurotoxins.

Poisonous cyanobacterial blooms cannot be distinguished easily from non-poisonous organisms such as true algae, without examination by microscopy and testing for toxins or toxicity.

Send water samples containing bloom material to labs that specialize in this work – including state vet labs.

Note: Do not expose your bare skin to these blooms because irritation can occur. Use plastic gloves when obtaining samples.