Are Puffer Fish Invertebrates



Do puffer fish have a backbone?

Fraser and his team followed the development of pufferfish spines in embryos. While they had initially hypothesized that the spines formed from scales — that the pufferfish lost its scale component but retained the spine — they found that the spines are developmentally unique from scales.

Is a puffer fish a bony fish?

Bony fish dominate the oceans. They differ from cartilaginous fish because they have bone skeletons and a swim bladder that helps them float.

What are puffer fish spines made of?

What you are looking at are the spines of pufferfish composed of nanocrystalline hydroxyapatite, protein(collagen), and water, the same materials as scales. Indeed, these spines are just modified scales. And like other scales, these spines originate during development from the mesoderm layer of the dermis or the skin.

Do all puffer fish have spikes?

Most species also have spines. Those of most puffers are hidden until they inflate, while the porcupinefish have external spines that are always visible. Either way, when the fish inflates, it turns itself into a spiky and unappetizing ball that is not easily swallowed by a predator.

Are puffer fish carnivores?

All pufferfish are carnivores (meat eaters). Figure 8 pufferfish have two rows of teeth that allow them to crush hard shells to eat mollusks, krill, oysters, and other crustaceans. These teeth never stop growing, so the fish needs to grind them down by munching on hard-shelled foods.

Can I touch a puffer fish?

Poison spikes: One of the adaptations that helps the pufferfish survive is the ability to produce a poison known as tetraodotoxin. This toxin is secreted across their body, making puffers dangerous to touch and even more dangerous to consume.

Is a blowfish also called a puffer fish?

A puffer (family Tetraodontidae) swimming in its inflated and normal states. puffer, also called swellfish, or blowfish, any of about 90 species of fishes of the family Tetraodontidae, noted for their ability when disturbed to inflate themselves so greatly with air or water that they become globular in form.

Do pufferfish have bones or cartilage?

Abstract. The pufferfish skeleton lacks ribs and pelvic fins, and has fused bones in the cranium and jaw.

Do puffer fish have scales?

Puffer fish do not have scales. Their skin is thick and rough. Some species have spines on the skin, which offer additional protection against the predators.

Is pufferfish and porcupine fish the same?

Pufferfish are from the family Tetraodontidae while porcupinefish are from the family Diodontidae. The main difference between the two is the presence of spines (which are really specialized scales) that present themselves when the porcupinefish puffs up in the face of a threat. Pufferfish do not have these spines.