What are the characteristic features of Euglenoids?

(N/A) Some characteristic features of Euglenoids are as follows:
$1$. Euglenoids (such as $Euglena$) are unicellular protists commonly found in stagnant fresh water.
$2$. Instead of a cell wall,they have a protein-rich layer called a $pellicle$ which makes their body flexible.
$3$. They possess two flagella,a short one and a long one,at the anterior end of the body.
$4$. They contain a light-sensitive eyespot $(stigma)$ that helps in detecting light.
$5$. They are photosynthetic in the presence of sunlight due to the presence of chlorophyll pigments identical to those in higher plants. However,in the absence of sunlight,they behave like heterotrophs by predating on other smaller organisms.
$6$. Due to the presence of both plant-like (photosynthesis) and animal-like (heterotrophy/flexibility) features,they are considered a connecting link between plants and animals.