Adventure Ausrama Blog

It is commonly believed that spiders are land dwelling creatures that eat air breathing prey. However, this is a misconception. New research shows certain spiders eat fish. These spiders exist on all continents except Antarctica. No less than eight kinds of spider consume fish up to twice their size. they also eat amphibians, mice, bats and birds. The diving bell spiders lives underwater. Many spiders live on the edge of water bodies and will eat just about anything that can be caught. Some fish they catch are very large indeed. Spiders take the chance of a rough fight because nearly all of a fish is edible. They hunt by holding on to something solid on the land with two of their rear legs. When a fish actually touches one of the six legs in the water the spider pounces completely leaving the land and bites the fish on the neck. We do not know everything about nature. Much of the living habits of animals is still unknown. As time goes on and data are accum...

Climate change can cause changes in behavior. As water becomes warmer so some species of fish become aggressive. Some fish are inherently timid while others are bold. In experiments on fish from the Australian Barrier reef, when water was slowly warmed normally timid fish became aggressive. Their rate of activity increased as well. Evolution has created fish that fit into a niche where survival depends on a fish being very careful about its surroundings. If they openly attack larger fish it could mean the smaller ones will be eaten. It is possible that similar changes will occur with reptiles, amphibians, ectotherms and even mammals. If timid animals become bold then they could be killed off by predators or by humans using harvesting equipment trying to catch other animals for food. Only a very small increase in temperature led to the change. In the tests, fish were bred in captivity then released into holding tanks where the water was slowly warmed. They had no chance to socializ...