• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar
  • Texas A&M Forest Service
  • Texas A&M Veterinary Medical Diagnostics Laboratory
  • Texas A&M AgriLife Extension Service
  • Texas A&M AgriLife Research
  • Texas A&M College of Agrculture and Life Sciences
AquaPlant
AquaPlantA Diagnostics Tool for Pond Plants and Algae
  • Menu
  • Home
  • Identify a Plant
  • Do I need a permit?
  • FAQs
  • Glossary
  • Videos
  • Online Courses
  • Get Help

Euglena

Euglena spp.

euglena
euglena

What is Euglena?

Physical Characteristics

  • Pear shaped
  • Single-celled micro-organism
  • 1-2 tails
  • 0.0006-0.02 inches
  • One nucleus
  • Many chloroplasts
  • Green or red in color
  • One contractile vacuole
  • One bright-red eyespot

Where Does it Grow?

Euglena can be found all over the world in any water body and in moist soils, often forming large blooms.

Pros and Cons of Euglena

Some species of euglena can form large “blooms” over ponds and lakes that are toxic. If these blooms are allowed to grow, the fish population will begin to die off.

How to Manage Euglena
Plant Glossary

Search for a type of plant

2023 Aquatic Webinars

Feb. 24: Ornamental Ponds and Water Gardens

Mar. 21: Selecting Herbicides for Aquatic Vegetation Control

Apr. 18: Pond Stocking 

May 16: Aquatic Plant ID & Management Options

Jun 20: Fish Management Strategies

Email Subscription

Receive updates on upcoming webinars and newly published materials.

Sign Up Now

Hire a Professional Contact Your Ag & Natural Resource Agent Aquatic Plant Nurseries Permissions and Citations Aquatic Herbicide Tables

Bookstore Items

Aquatic Vegetation Identification Cards

Texas A&M AgriLife Extension Service
Texas A&M University System Member

Photo Credits: The majority of the aquatic plant line drawings are the copyright of the University of Florida Center for Aquatic Plants (Gainsville). They are used with permission.

Aquatic plant photographs were provided by David Bayne, Jim Davis, Kelly Duffie, Billy Higginbotham, Michael Masser, John Clayton, Chetta Owens, Diane Smith, Joe Snow, Don Steinbach, Bridget Robinson Lassiter and Peter Woods.

You may use these photos, so long as you give credit to AquaPlant.

  • Compact with Texans
  • Privacy and Security
  • Accessibility Policy
  • State Link Policy
  • Statewide Search
  • Veterans Benefits
  • Military Families
  • Risk, Fraud & Misconduct Hotline
  • Texas Homeland Security
  • Texas Veterans Portal
  • Equal Opportunity
  • Open Records/Public Information