Sealife guideThe sea life glossaryOur glossaries

Last updated on 01/19/2026 at 11:41 PM
English
Description
French
T
Français
thallus
Définition
A simple, undifferentiated plant body that lacks true stems, roots and leaves, typical of algae, fungi and some liverworts.
Anglais
thalle
Looking for the definition of a term but can't find it ? Or want to suggest one ? Contact us and we'll be happy to help !

Our latestUpdates

The Atlantic tarpon
Wednesday, February 18th 2026
The Atlantic tarpon
The Atlantic tarpon is a large coastal fish that can grow up to 8 feet long and weigh over 330 pounds, with a silvery body covered in large, reflective scales. Known as the Silver King, it is famous for its spectacular leaps and fierce fight when hooked by sport fishermen.
The dugong
Friday, January 30th 2026
The dugong
Discover the dugong, a gentle “sea cow” of tropical waters. Learn about its habitat, diet, reproduction, morphology, and the threats facing this unique marine mammal.
Dolphins: ocean's smartest creatures
Friday, January 23rd 2026
Dolphins: ocean's smartest creatures
Discover dolphins, the ocean's geniuses: explore their intelligence, social behavior, sophisticated communication, species diversity and vital role in marine ecosystems.
Photo of the Day
Poulpe géant du nord du Pacifique (Enteroctopus dofleini)
Poulpe géant du nord du Pacifique
(Enteroctopus dofleini)