Hadith explanation

Q: Well we know that there is no whale beneath earth? Here is the explanation from تفسير Tanwîr al-Miqbâs min Tafsîr Ibn Abbas

And from his narration on the authority of Ibn 'Abbas that he said regarding the interpretation of Allah's saying (Nun): '(Nun) He says: Allah swears by the Nun, which is the whale that carries the earths on its back while in Water, and beneath which is the Bull and under the Bull is the Rock and under the Rock is the Dust and none knows what is under the Dust save Allah. The name of the whale is Liwash, and it is said its name is Lutiaya'; the name of the bull is Bahamut, and some say its name is Talhut or Liyona. The whale is in a sea called 'Adwad, and it is like a small bull in a huge sea. The sea is in a hollowed rock whereby there is 4,000 cracks, and from each crack water springs out to the earth. It is also said that Nun is one of the names of the Lord; it stands for the letter Nun in Allah's name al-Rahman (the Beneficent); and it is also said that a Nun is an inkwell. (By the pen) Allah swore by the pen. This pen is made of light and its height is equal to the distance between Heaven and earth. It is with this pen that the Wise Remembrance, i.e. the Guarded Tablet, was written. It is also said that the pen is one of the angels by whom Allah has sworn, (and that which they write (therewith)) and Allah also swore by what the angels write down of the works of the children of Adam.

Looking at videos

Q: I uploaded a video of Maulana Tariq Jameel Saheb in which he mentions the ancestry of Prophet Muhammad صلی الله علیه وسلم up to Adam علیه السلام but a brother messaged that there is no Saheeh Sanad of the ancestry up to adam علیه السلام and ulama have prohibited to explain the Ancestry.

1) Kindly Guide me.

2) If there is any Saheeh Sanad then do let me know about that also.

Prawns

Q: Are prawns categorized as fish and if not what are they and will this make them halaal, makrooh or haraam?

Can one perform the Sunnats of fajr after the Fardh?

Q: I overslept and was late awakening for the fajr Salaah. Thinking it to be very late, I prayed wudhu and only the two fard of Fajr. However after reading this, I checked the perpetual calendar and realised there was still 11 minutes before sunrise. I immediately prayed both my sunnah and my fard of fajr, with 3 minutes still left for sunrise. Was this correct of me? What should I have done in this situation. Is my salaah valid?