Gambusia holbrooki
In some species, males invest virtually nothing in their offspring apart from sperm. So far, biologists believed that the most sexually active males in such species had an evolutionary advantage.
The status of Papahānaumokuākea Marine National Monument (pictured) is under threat. Photo by NOAA.
Under Executive Order 13795 to review all designations and expansions of National Marine Sanctuaries and Marine National Monuments established since April 28, 2007, the Trump administration is considering either the rollback or elimination of up to eleven marine sanctuaries as part of its “America-First Offshore Energy Strategy.
The “shells” of Paragiopagurus atkinsonaeis is custom-built for them by zoanthids (which are unfortunately dead in this photo).
From Pensoft:
‘Green-eyed hermit crab’ is the common name for a new species recently discovered off the West Coast of South Africa.