Given below is a table consisting of different groups of animals and their characteristics features. Some of the features are incorrect. Identify the odd one out in each.

Sl. No.	Group	Characteristic features	Odd one out
1.	Porifera	porous animals, have tentacles, fixed to surface
2.	Pisces	live in water, scaly skin, warm blooded, fins for swimming
3.	Amphibia	cold blooded, lungs in adults, scaly skin
4.	Aves	cold blooded, wings, feathers, bones with large air cavities