Fishing spiders are often seen near water bodies, gliding across surfaces or resting on vegetation. Their presence frequently raises questions about potential danger to humans. This article addresses concerns about their interactions with humans and describes their characteristics.
Are Fishing Spiders Venomous?
Fishing spiders are venomous, meaning they inject toxins, unlike being poisonous, which implies toxicity upon ingestion. All true spiders are venomous, primarily using it to subdue prey. A fishing spider’s venom is not medically significant to humans, typically causing only temporary discomfort. They use this mild venom to paralyze or kill prey like aquatic insects, tadpoles, or small fish.
These spiders are not aggressive towards humans and usually flee when approached. Bites typically occur only if the spider feels threatened, such as when accidentally trapped against skin or handled. Wasting venom on a large threat like a human is inefficient, as venom production requires significant energy.
Understanding a Fishing Spider Bite
A fishing spider bite is generally rare, typically occurring only if the spider is provoked or accidentally pressed against skin. Effects are usually mild and localized, comparable to a bee or wasp sting. Common symptoms include localized pain, redness, and mild swelling at the bite site.
Clean the wound with mild soap and water. Applying a cool compress or ice pack wrapped in a cloth can help reduce pain and swelling. An over-the-counter pain reliever may also be used. Seek medical attention if symptoms worsen, signs of an allergic reaction appear, or if you have concerns.
Identifying Fishing Spiders
Fishing spiders are large, robust arachnids, often mistaken for wolf spiders due to their size and coloration. They typically range from brownish-gray to tan, displaying distinct black and light brown markings on their bodies and striped or banded legs. Females measure between 15 mm and 26 mm in body length, with a leg span up to 3 inches.
These spiders are commonly found near water bodies like ponds, streams, lakes, and wetlands, aligning with their name. They navigate aquatic environments well, walking and gliding across the water’s surface using specialized leg hairs. Some species can even dive and remain submerged briefly to avoid predators or capture prey. Their presence near water and unique aquatic abilities are key identifiers.