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Male fiddler crabs’ large claws may look unwieldly, but a new study demonstrates that these large weapons are not only for show.

Veteran Smithsonian evolutionary biologist Haris Lessios has made major contributions to the understanding of how new marine species arose following separation by the Isthmus of Panama.

To mark the beginning of an era in marine research in the Eastern Tropical Pacific, Smithsonian scientists launched numerous long-term marine ecosystem studies in Panama’s Coiba National Park.

From tiny banana seeds to giant coconuts, it’s tough for seeds to survive in tropical soils where they are under attack by fungi, bacteria, insects and animals. By understanding how seeds defend themselves, tropical biologists contribute to reforestation, crop management and sustainable agriculture in the tropics.