Spinner dolphins have many interesting relationships with the
organisms that surround them in their habitat. They can serve as prey for many
larger mammals, as well as a predator for some of the smaller creatures of the
ocean. Shrimp, squid, many species of fish, and some other small animals are the
main components of a dolphin's diet, whereas Killer whales and sharks are great
examples of a common predator to these Spinners. In some areas, these dolphins
have been seen interacting with Spotted dolphins. By integrating into one large
group, some of the mammals were able to rest while the others were on the
lookout for predators. A certain species of fish, Remoras, have a mutualistic
relationship with Spinner dolphins as well as many other marine mammals. These
fish grasp the mammals to get a free ride to a new location, while providing no
harm in return. 
On the other hand, there are some parasites, such as trematodes,
cestodes, nematodes, and acanthocephalan worms that have been found on and in
spinners. These organisms can potentially seriously harm the animals.
The Stenella longirostris has had many effects on humans
for many years. Dolphins have been held in captivity for various reasons, such
as entertainment, education, and research. Entertainment by dolphins is now a
multi-million dollar industry in the United States and people travel from far
and wide to see these talented dolphins perform. This particular species of
dolphins have not been used as much for entertainment as other species, such as
the Bottlenose dolphin, but have contributed greatly to education and research
of scientists. Not only are these mammals used in captivity, but they have also
been used in their home environments to assist the United States military in
locating weapons and aiding in other related tasks. Many of these animals have
been used for food in various parts of the world as well, but those numbers seem
to be decreasing as the years go on.
This page was created by Sally Johnson