Allah SWT says: وَاللَّهُ خَلَقَ كُلَّ دَآبَّةٍ مِّنْ مَّآءٍ ۖ فَمِنْهُمْ مَّنْ يَمْشِى عَلٰى بَطْنِهِۦ وَمِنْهُمْ مَّنْ يَمْشِى عَلٰى رِجْلَيْنِ وَمِنْهُمْ مَّنْ يَمْشِى عَلٰىٓ أَرْبَعٍ ۚ يَخْلُقُ اللَّهُ مَا يَشَآءُ ۚ إِنَّ اللَّهَ عَلٰى كُلِّ شَىْءٍ قَدِيرٌ "Allah has created every [living] creature from water. And of them are those that move on their bellies, and of them are those that walk on two legs, and of them are those that walk on four. Allah creates what He wills. Indeed, Allah is over all things competent." (QS. An-Noor: Verse 45) * Via the Beautiful Qur'an https://goo.gl/QLwc8B