Another unusual trait of the searobin is the frog like croaking sound they make when hooked. ... Beware, this harmless fish does have a mild poison in the sharp spines of their gill plates and dorsal fins which can cause pain for a few days when stung.

Are sea robins poisonous?

Sea robins have sharp spines on their gill plates and dorsal fins that inject a mild poison, causing slight pain for two to three days.

Where are the spines on a sea robin?

Appearance. The northern sea robin has a tapered body that gets thinner toward the tail, growing to 12 to 16 inches in length. It has a mottled grayish or reddish-brown back and a whitish belly. Sharp spines appear on its cheeks, neck, sholders and above each eye.