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?