“That's what they get for coming up on land.”
“GROSS! What if I'd stepped on it by accident?”
“The sea rejects its dead.”
“THAT'S WHAT YOU GET FOR LIVING IN THE OCEAN”
“Njörd's depths höld many secrets.”
“Hmm... that might be good in a soup.”
“They're picked clean dry.”
“Bones from the sea, these look to be!”
“Poor fish, shoulda stayed in water, florp.”
“These are definitely sea monster bones!”
Sea Bones are naturally spawning objects exclusive to Don't Starve Together, introduced in Return of Them, and found exclusively on the Lunar Island in the Rocky Beach Biome.
They can be hammered to obtain 2 Bone Shards plus 50% to get an extra one.