Genesis 1:22

And God blessed them, saying, Be fruitful, and multiply, and fill the waters in the seas, and let fowl multiply in the earth.

1. God blessed the animals in the seas and the air to multiply and be numerous.
2. God gives blessings verbally, using language that can be understood or at least translated.
3. It is apparently a blessing, not only for these animals, but for all creatures, including humans, to have numerous offspring.
4. The difference between God's command in verse 20, "let the waters bring forth abundantly the moving creature . . .", and this blessing is not completely clear to me, except it appears verse 20 is talking about the initial creation of these animals, whereas this addresses their reproduction.
5. Did these animals hear and understand the blessing given them by God? It has clearly been fulfilled.