One verse

Srimad Bhagavatam 8.24.44

8.24.44

सोऽनुध्यातस्ततो राज्ञा प्रादुरासीन्महार्णवे । एकश‍ृङ्गधरो मत्स्यो हैमो नियुतयोजन: ॥ ४४ ॥

so ’nudhyatas tato rajna pradurasin maharnave eka-srnga-dharo matsyo haimo niyuta-yojanah

sah
the Lord
anudhyatah
being meditated upon
tatah
thereafter (hearing the words of the saintly brahmanas)
rajna
by the King
pradurasit
appeared (before him)
maha-arnave
in the great ocean of inundation
eka-srnga-dharah
with one horn
matsyah
a big fish
haimah
made of gold
niyuta-yojanah
eight million miles long.

Then, while the King constantly meditated upon the Supreme Personality of Godhead, a large golden fish appeared in the ocean of inundation. The fish had one horn and was eight million miles long.