In ancient depths, I silently roam, armored with scales as my timeless throne. By caviar's fame, I am known, a prehistoric swimmer in a river's flowing home.

I am the second of three, for a famous composer, one of Austrian ancestry. Many people think I went deaf, but that is not true, instead I died, dueling compositions with the court composer. I died very young, but still I live on, in my music I lovingly wrote.

Without a castle I’d be a pond. Without following my path you’d surely come to harm. With walls and water I guard the way, with many watchmen keeping intruders at bay.

I am a house where the tenant is still, Carved with precision and ancient skill. I'm made of stone to guard the dead, With heavy lid and a cold, hard bed

Crack my spine, devour me whole, I bring you visions, And never ask a toll. From histories to nuclear fission, We learn many topics. We soar among the stars, Or wash up in the tropics We drive stolen cars, Run amongst the animals, Hold out for a loved ones plight, Or pine for lost Annabelles We have it all within our sights. What am I?