Appearance
The feed
The Feed tab is what divers you follow are posting. Posts are called bubbles.

Each bubble is a photo or video with a caption. Under it sit four actions:
- React — hold to pick a reaction rather than a plain like.
- Comment — open the post and write.
- Share — send it on.
- Save — keep it in Saved posts for later.
Tap a photo to open it full screen.
Reactions

Blue Trails swaps the usual thumbs for sea creatures. Press and hold the reaction button and pick the one you mean.
Opening a post
Tapping a bubble opens it with its comments and the list of who reacted, and a box at the bottom to write your own comment.