BRIEF: ‘Sneaky’ Male Fish Not As Sly As They Might Think

Some male ocellated wrasse build seaweed nests to attract females. The fish are found in the eastern Atlantic and throughout the Mediterranean Sea.
Courtesy of Susan Marsh-Rollo
When it comes to sex, some male fish can’t catch a break. In species such as the ocellated wrasse, females prefer to mate with “nesting” males that build handsome seaweed nests, court females and care for eggs over smaller, less colorful “sneaker” males. Forgoing any courtship or paternal duties, these males instead wait for a female to release her eggs near a nesting male before sneaking up and inundating the nest with large numbers of sperm. To counter, nesting males release fewer but faster sperm. Scientists have thought that in this fish species and in others