That’s a grey seal pup. Boston is awfully far from the closest colonies given his size. Genuinely call it in to NEA or IFAW. They may decide to leave him or do a transport. If he’s way too underweight, they can also provide nutrition and care.

The street in that picture currently has 6 total lanes (3 each way) plus the wide SWC bike path. How does this new design only have 4 lanes total? I would love dedicated bus lanes, but making that a single lane for cars would suck.