sa uccakase dhavalodaro daro
yathabja-khande kala-hamsa utsvanah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The white and fat-bowled conchshell, being gripped by the hand of Lord Krsna and sounded by Him, appeared to be reddened by the touch of His transcendental lips. It seemed that a white swan was playing in the stems of red lotus flowers.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The redness of the white conchshell due to the lip-touch of the Lord is a symbol of spiritual significance. The Lord is all spirit, and matter is ignorance of this spiritual existence. Factually there is nothing like matter in spiritual enlightenment, and this spiritual enlightenment takes place at once by the contact of the Supreme Lord Sri Krsna. The Lord is present in every particle of all existence, and He can manifest His presence in anyone. By ardent love and devotional service to the Lord, or in other words by spiritual contact with the Lord, everything becomes spiritually reddened like the conchshell in the grip of the Lord, and the paramahamsa, or the supremely intelligent person, plays the part of the ducking swan in the water of spiritual bliss, eternally decorated by the lotus flower of the Lord’s feet.