Simple Alien Drawings

Here is a bunch of aliens I drawed some years ago. I will give a little description for all of them of them, I start from top left to bottom right.

N.1
The brown thing is a walking sapient tree. The red things are its eyes, the yellow thing is its leaf which use carotenoids instead of chlorophyll and the blue-green things are the trees berries/seeds.

N.2
The dark blue creature is a simple sketch of an amphibian species known as Belphans. They are an extremely playful race that rarely gets depressed.

N.3
The blue amoeba thing with a purple core is an unicellular macro-organism that can turn itself invisible.

N.4
The grey biped with the pointy head is an artificial life form composed of nanobots.

N.5
The yellow, blue and pink guy is a crystalline jellyfish-thing with insectoid limbs/antennae. Its yellow shell functions as an eye and it communicates through light flashes from the red lamp-like organ on the top.

N.6
The green glowing thing is a mobile fungus that feeds on radioactivity and communicates by emitting waves of heat and cold.

N.7
The bright pink thing is a hermaphroditic mammal that lacks bones and have a lot of eyes.

N.8
The nearly-sessile yellow thing with a red claw... I don´t know exactly what it should be. Either it is transparent or its body is torus-shaped and a web (that is a part of the creature) is located in the hole.

N.9
The purple thing is a starfish/octopus-like being that has a single sensory organ and it can grow so many tentacles it want to grow. It lacks a mouth and feeds by absorbing food through the tentacles.

N.10
The green thing that looks like a sandwich with red claws is floating creature that dwells in the soup-like carbon dioxide atmosphere of its high gravity home-planet.

N.11
The purple serpent thing is nothing special, just a member of an emotionless, agressive cyborg race.

N.12
The purple-backed bug thing with the yellow fleshy feet is... I don´t know. The only thing I know is that its feet constantly secretes a green slime.

N.13
The yellow thing with a red core is another slimy cell-like being. Even if it looks like an amoeba, it is not amorpheus but it is very strechy and elastic.

N.14
The two grey creatures have a skin made of rock and red eyes. The second one with the tentacles have a retractable proboscis/claw-thingy.

N.15
The light pink thing is boneless worm-like creature that have its mouth between its three tentacles. It can dwell both on land and in water and it is a very good climber.

N.16
The green snake/slug is from a high gravity planet. It is 2 meters high and 10 meters long. It smells with the tongue that also functions as an arm and its eye-like organs functions as ears. It has a single nostril.

N.17
The black blobby thing is a simple skecth of the Skadea I gave to Transapient.

N.18
The light blue thing is a small translucent creature with rubber-like flesh and three arms (the central arm functions as a genital).

N.19
A red tripod-squid with one single eye and a single ring-shaped compound eye.

N.20
The yellow bipedal thing is a two-headed creature with many eyes and tentacles growing from its chest.

N.21
The green blue-winged thing is a tentacled insect with a trumpet-like proboscis. It has two red compound eyes, each one consists of three units.

If anyone want to use some of these aliens, I give them permission to incorporate them to their projects.
Exceptions are N. 2, 8, 14, 16 and 17 (that belongs to Transapient). They still belong to me (except for N. 17).