There are short sensory barbels around the head, together with short, backward pointing spines on the gill covers.

The larvae typically have protective spines on the head, over the gills, and in the pelvic and pectoral fins.

Some of this organization is found among the heliozoa, but those lack central capsules and only produce simple scales and spines.

RF So if you look carefully at this, what you see is that they have spines and until a few weeks ago, no one knew what they did.

Each time, my grandmother would utter some words in Arabic, take a red apple and stab it with as many rose thorns as the number of warts she wanted to remove.

This family includes groupers and coral cod (not related to true cod), which are all characterised by having three spines on the gill cover and a large mouth lined with more than one row of sharp teeth.