The stigma is close to the flagellum. More than 8000 species of green algae are known. The flagellated forms often have a stigma. Gonium Colonial flagellate alga which forms a small carpet . We see a group of eight cells here, but normally there are sixteen.
Every cell has two long flagella.
The colony stops sometimes, then starts swimming again. Haematococcus The name of this protist indicates that it is the colour of blood and that its shape is spherical. When this alga is unhappy, it fixes itself to the bottom of its environment and takes the red colour due to the abundance of carotenoids. It lives both in clear and clean waters like springs and in puddles of rain water. It has two flagella of equal length, but which are endowed with independent movement and which make the cell tremble as it moves.