Anyone know what this is?

[1mp3r1al]

Stepped on this while playing on the beach in Aruba. Any ideas?

 

 

[ReefdUp]

Links are broken for me.

Sent from my SM-G935P using Tapatalk

[bues0022]

Wild guess: dried up piece of seaweed

[smh254]

Maybe part of a shark egg


Sent from my iPhone using Tapatalk

[ReefdUp]

Odd, I can't see the photos here but I can on my email notification.

It's a water caltrop seed pod, an invasive species of plant.

Sent from my SM-G935P using Tapatalk

[ReefdUp]

https://www.canr.msu.edu/news/national_invasive_species_awareness_week_water_chestnut_bohling16

Sent from my SM-G935P using Tapatalk

[1mp3r1al]

Ah, thanks!