Millions of tiny sea butterflies have made a brief appearance. These creatures are actually tiny, free-swimming marine snails. They have wing-like swimming appendages that give them a butterfly-like appearance.

The name sea butterflies comes from these distinctive appendages. Further details about this phenomenon are available from the source. More information can be found about these tiny marine snails and their brief visit to Texas beaches, but basic details are that they are small and have a unique appearance due to their swimming appendages.