You may concentrate on two spells at once.

If you do, you have disadvantage on concentration checks. 

If you concentrate on one, you have advantage on concentration checks.

You get to see in darkness, up to 60 feet.

Cecaelias skin naturally shifts pigments.  They use this natural ability as both a means of communication and as a defense mechanism. You gain Proficiency in Stealth checks.  Additionally whenever the Cecaelia attempts to hide they gain advantage on the roll, and may use their intelligence modifier in place of dexterity.

You have 8 tentacles that are around 15 ft long that you can control at will.

You can carry objects and weapons. If you attempt to use a weapon with your tentacles you have disadvantage on any attacks with it. For a single-handed weapon you need at least two tentacles, and for a two-handed weapon three.

You can also grapple enemies with them. Depending on your type of Cecaelia, you will deal one of three choices of damage per tentacle you use to grapple the target.

To be able to walk properly you need at least three tentacles on the ground.

You can breathe and move at double your speed underwater.

Your Intelligence increases by 2, and your Dexterity Increases by 1

Cecaelias age at an incredibly slow rate they enter adulthood at the age of 110 and have been known to live up to 700 years old.

Cecaelias tend to be neutral or chaotic.

Cecaelias tentacles can be up to 15 feet long each, and their torsos are another 2 and a half to three feet long. but their tentacles are curled to maintain that they only stand up to about 6 feet tall.  Cecaelias also lack a traditional bone structure making them lighter than expected often weighing between 110 and 150 pounds.  Your size is Medium

You can speak read and write Common, Deep Speech and a language of your choice.