Sea grape or seagrape may refer to:

Plants and algae

• Coccoloba uvifera, a flowering plant native to tropical America, including Florida, the Caribbean and nearby islands
• Seaweeds in the genus Caulerpa, especially:
  • C. lentillifera, eaten in Southeast Asia
  • C. racemosa
• Ephedra distachya, a shrub that grows in southern Europe and parts of western and central Asia
• Halosaccion glandiforme, another seaweed unrelated to Caulerpa.

Animals

• Molgula manhattensis, a species of tunicate, or more generally any member of the genus Molgula
• The eggs of cuttlefish