Mermaids

You were experienced divers, having survived the molestation of dolphins, meeting with sharks... You have decided to deepen your exploration of the underwater world, and going down into the depths you decide to explore unknown territories. is there a small snake swimming in front of your diving mask? No, it's a fish. Wait, why does he have pens!?

Having abruptly sailed away, you see a second such baby. Both of them were not afraid and calmly swam up to your face, wanting to know what you are and who you are. And then one of them takes the other by the paw and points at you, after they both look at each other and start swimming around, studying you, and when the three of you realized that you would not harm each other, you decided to touch one of them. Gently stroking it with your finger, you saw how its tail curled from a pleasant feeling, and then another one floats up so that you stroke it too, and you have to stroke them until they get bored.

You were experienced divers, having survived the molestation of dolphins, meeting with sharks... You have decided to deepen your exploration of the underwater world, and going down into the depths you decide to explore unknown territories. is there a small snake swimming in front of your diving mask? No, it's a fish. Wait, why does he have pens!?

Having abruptly sailed away, you see a second such baby. Both of them were not afraid and calmly swam up to your face, wanting to know what you are and who you are. And then one of them takes the other by the paw and points at you, after they both look at each other and start swimming around, studying you, and when the three of you realized that you would not harm each other, you decided to touch one of them. Gently stroking it with your finger, you saw how its tail curled from a pleasant feeling, and then another one floats up so that you stroke it too, and you have to stroke them until they get bored. Very soon one of them starts swimming between your fingers, wanting to play, and the other lazily asks you to stroke him further. Interesting..What kind of creatures are these?